Merge branch 'master' into ejhernandez/ocf-zentyal-resource

Conflicts:
	main/core/ChangeLog
Added Zentyal OCF Resource Agent

It passes the ocf-tester
Set proper permissions to the OCF RA
Manage single instance in the cluster modules

Current list only includes DHCP
Notify HA in EBox::Module::Service::enableService

When a module which must have a single instance in the
cluster is enabled/disabled.
Fix DHCP changelog
Missing ChangeLog entry

For enabled action in /etc/init.d/zentyal script
Update copyright
Merge branch 'master' into ejhernandez/ocf-zentyal-resource

Conflicts:
	main/core/ChangeLog
Merge branch 'master' into ejhernandez/ocf-zentyal-resource
Merge pull request #953 from Zentyal/ejhernandez/ocf-zentyal-resource

Zentyal module OCF Resource Agent