changed rabbit_hosts to use vip hostname instead of a list of actual controller hostnames.  OpenStack seems to handle rabbit failures better when the hostname does not change
Merge pull request #168 from CiscoSystems/rabbit_ha_fix

changed rabbit_hosts to use vip hostname instead of a list of actual controller addresses
Fix some comments and line length.
Update style and comments in core.pp.
Fix readability in site.pp.example.
Fixed a bunch of readability issues
Merge branch 'bugs/1206641' of https://github.com/CiscoSystems/grizzly-manifests into bugs/1206641

Conflicts:
	manifests/core.pp