Make error messages use "live image" instead of "bless/launch"

Change-Id: I1fea61ba15f8212841164bbc43f00b5a06e89d1b
Fix naming of new *.xml artifact uploaded with live images

For future, artifacts other than *.gc, and *.*.disk will all have form
<instanceDisplayName>.<originalFileExtension>

Change-Id: I698b6584958c3635138342d428fad8e06647feaf
Adding logrotate configuration file

Fixes OS-170

Adding a lograte configuration file for the nova-gc process.

Change-Id: I149c6ef458d1a8401a7e493f3fd4bc7747a1bc4e
Merge branch 'stable/folsom' into master

Change-Id: I0bde2897e2c920bbb4fe85aa5a31a668f9535d72