Allow packages string to be parameterized

Pass packages string to coi::profiles::cobbler_server as a parameter

Closes-Bug: #1317195
Merge pull request #60 from CiscoSystems/bugs/1317195

Allow packages string to be parameterized
Merge remote-tracking branch 'origin/icehouse' into fix/1325080

Conflicts:
	manifests/profiles/cobbler_server.pp