Add rhos-release element and use it in instack-build-images when building RHOS images
rhos-release tweaks

Set the new script +x and fix a typo in a variable name.
Add -y to yum commands
Fixups for rhos-release
Split $RHOS logic into a $RHOS and $RHOS_RELEASE. Will allow us to disable use
of epel/rdo, and make rhos-release optional.
Uses NODE_MEM and NODE_CPU when setting up the undercloud VM
Merge pull request #89 from gfidente/instack_vm_resources

Uses NODE_MEM and NODE_CPU when setting up the undercloud VM
Default filesystem type to XFS for RHEL 7.
Fix check for fedora user image. This error was non-fatal, but through an error
message.
Remove merged review 129310
Remove merged review 129311
Remove merged review 129727
Remove merged review 130420
Remove merged review 130422
Remove merged review 130875
Remove merged reviews 130608 and 130714