Fixed the bug where vm_instance.ha_enabled wasn't updated during service offering upgrade
Conflicts:
server/src/com/cloud/server/ManagementServerImpl.java
1) Introduce new managers - ProjectManager and DomainManager. Moved all domain related code from AccountManager to DomainManager.
2) Moved some code from ManagementServerImpl to the correct managers.
3) New resource limit for Domain - Project