Upgrading ADB hosts within the CI Lab

[Larry Works]

All,

The two ADB hosts within the CI Lab are currently running Raring which
has reached EOL (and then some). Some of the packages needed for touch
testing have been updated but the updates are not available for Raring.
To facilitate testing with the updated packages both ADB hosts (Ashes
and Okiku) will be upgraded to Saucy on Friday March 21st beginning at
2000 hours UTC.  The updates will not be run concurrently so we will
start with ashes at 2000 followed by okiku at approximately 2300. During
the upgrade process the devices attached to the hosts being upgraded
will not be available for testing/Jenkins jobs.

The devices affected per host are:

Ashes:
    flo-01    
    flo-02    
    flo-03    
    maguro-01 
    maguro-02 
    maguro-03 
    maguro-04 
    maguro-05 
    maguro-06 
    mako-01   
    mako-02   
    mako-04   
    mako-05   
    mako-06   
    mako-07   
    mako-09   
    mako-10   
    mako-11   
    manta-01  
    manta-02

Okiku:
    flo-04    
    flo-05    
    ps-maguro-01
    ps-maguro-02
    ps-maguro-03
    ps-maguro-04
    ps-maguro-05
    ps-maguro-06
    ps-maguro-07
    ps-mako-01
    ps-mako-02
    ps-mako-03
    ps-mako-04
    ps-manta-01

Tests/Jobs affected per host are:
Ashes:
    eventstat
    smem
    memevent
    touch-smoke-daily

Okiku:
    daily-release-touch-images
    touch-flash
    generic-mediumtests
    mir-mediumtests
   

No other services/hosts should be affected or interrupted during the
upgrade process.