[Bug 2045399] [NEW] nova.conf contains some garbage options

[Takashi Kajinami]

Public bug reported:

The nova.conf file installed by the nova-common package contains a few
unused options in the end.

I suspect these options are leftover of some old workarounds.

```
[cells]
enable = False

[os_region_name]
openstack =
```

This was found in Ubuntu 22.04 + UCA Bobcat.

# dpkg -l | grep nova
ii  nova-api                                    3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - API frontend
ii  nova-common                                 3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - common files
ii  nova-compute                                3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - compute node base
ii  nova-compute-kvm                            3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - compute node (KVM)
ii  nova-compute-libvirt                        3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - compute node libvirt support
ii  nova-conductor                              3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - conductor service
ii  nova-novncproxy                             3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - NoVNC proxy
ii  nova-scheduler                              3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - virtual machine scheduler
ii  python3-nova                                3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute Python 3 libraries
ii  python3-novaclient                          2:18.4.0-0ubuntu1~cloud0                             all          client library for OpenStack Compute API - 3.x

** Affects: nova (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  The nova.conf file installed by the nova-common package contains a few
  unused options in the end.
  
  I suspect these options are leftover of some old workarounds.
  
  ```
  [cells]
  enable = False
  
- 
  [os_region_name]
  openstack =
  ```
+ 
+ This was found in Ubuntu 22.04 + UCA Bobcat.
+ 
+ # dpkg -l | grep nova
+ ii  nova-api                                    3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - API frontend
+ ii  nova-common                                 3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - common files
+ ii  nova-compute                                3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - compute node base
+ ii  nova-compute-kvm                            3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - compute node (KVM)
+ ii  nova-compute-libvirt                        3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - compute node libvirt support
+ ii  nova-conductor                              3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - conductor service
+ ii  nova-novncproxy                             3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - NoVNC proxy
+ ii  nova-scheduler                              3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - virtual machine scheduler
+ ii  python3-nova                                3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute Python 3 libraries
+ ii  python3-novaclient                          2:18.4.0-0ubuntu1~cloud0                             all          client library for OpenStack Compute API - 3.x

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https://bugs.launchpad.net/bugs/2045399

Title:
  nova.conf contains some garbage options

Status in nova package in Ubuntu:
  New

Bug description:
  The nova.conf file installed by the nova-common package contains a few
  unused options in the end.

  I suspect these options are leftover of some old workarounds.

  ```
  [cells]
  enable = False

  [os_region_name]
  openstack =
  ```

  This was found in Ubuntu 22.04 + UCA Bobcat.

  # dpkg -l | grep nova
  ii  nova-api                                    3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - API frontend
  ii  nova-common                                 3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - common files
  ii  nova-compute                                3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - compute node base
  ii  nova-compute-kvm                            3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - compute node (KVM)
  ii  nova-compute-libvirt                        3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - compute node libvirt support
  ii  nova-conductor                              3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - conductor service
  ii  nova-novncproxy                             3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - NoVNC proxy
  ii  nova-scheduler                              3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute - virtual machine scheduler
  ii  python3-nova                                3:28.0.0-0ubuntu1~cloud0                             all          OpenStack Compute Python 3 libraries
  ii  python3-novaclient                          2:18.4.0-0ubuntu1~cloud0                             all          client library for OpenStack Compute API - 3.x

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