[Bug 1776375] Fix proposed to aodh (stable/queens)

[OpenStack Infra]

Fix proposed to branch: stable/queens
Review: https://review.openstack.org/574935

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https://bugs.launchpad.net/bugs/1776375

Title:
  Making gnocchi resource support multiple projects with the same name

Status in Aodh:
  Fix Released
Status in Ubuntu Cloud Archive:
  New

Bug description:
  [Impact]

  There are 500 error when creating
  AodhGnocchiAggregationByResourcesAlarm

  If openstack env has the same projects name ( e.g. services ) in
  different domain ( e.g. default, service_domain), It will get default
  domain even if you want to choose service_domain.

  [TestCase]

  1. deploy openstack env (https://pastebin.ubuntu.com/p/3SXDQT9hWq/)
  - juju run-action heat/0 domain-setup

  2. create new domain, project, user, role etc (https://pastebin.ubuntu.com/p/x8VDrzbWS3/)
  3. create image, flavor, network if needed
  4. source testrc (https://pastebin.ubuntu.com/p/b25bSY3ktf/)
  5. openstack keypair create testkey > ~/testkey.pem; chmod 600 ~/testkey.pem;
  6. prepare stack templates
  web.yaml(https://pastebin.ubuntu.com/p/vr6brGjqbp/)
  lb_server.yaml(https://pastebin.ubuntu.com/p/mmJ39VsCg6/)
  7. openstack stack create -t ./web.yaml asg --wait

  [Regression]
  This patch changes aodh code for gnocchi resource. this patch adds new option for gnocchi resource setting, User should set this properly. After this patch, restarting aodh(apache2) services. this causes short service unavailable. 

  [Others]

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