block hypervisor consumer creation when hypervisor_id is in use
Index on hypervisor_id for faster hypervisor checkins
added config option to disable hypervisor_id blocking
Adding provider class to persistence.xml
Merge pull request #525 from candlepin/ckozak/hypervisor_creation_limit

Ckozak/hypervisor creation limit
Merge pull request #529 from candlepin/wottop/peristence_provider_class

Adding provider class to persistence.xml
Merge branch 'master' into wottop/uuid2

Conflicts:
	src/main/resources/db/changelog/changelog-create.xml
	src/main/resources/db/changelog/changelog-update.xml