Create and redistribute ssh keys for Nova user

The nova non-life migration feature requires to be able
to ssh from nova@ to other nova@ users on other compute nodes.
Setup the ssh keys properly for that.
Merge pull request #246 from rhafer/release/roxy/master

Run nova-manage db_sync as the nova-user
Increase retries to prevent failure of smoke test.
Merge pull request #241 from waynepallen/pull-req-release-roxy-master-87ff74083456503cbe390e7cf6ef13dba3f0b883

Create and redistribute ssh keys for Nova user [1/1]
Merge pull request #252 from cdearborn/pull-req-release-roxy-master-0a2fad7dc6318c0af6838ed0cffbc26568404d70

Fixed failure in nova smoketests [1/1]
bnc#836363 - applying xen proposal fails after moving away from kvm
bnc#836372 - can not switch compute nodes from xen to kvm
smoke should be executable
Merge pull request #258 from MirantisDellCrowbar/bug/smokeperm/roxy/master

smoke should be executable
only require certificate files for controllers (bnc#851514)
Merge pull request #255 from jsuchome/release/roxy/master

applying xen proposal fails after moving away from kvm
use "install_packages" function to install smoketest dependencies
smoketest: remove no longer used "fixed_ips" array
smoketest: try to avoid bash v4 features

SLES does only have a bash-3.2