CLOUDSTACK-737,
         allow to add security group enabled networks in security group enabled zone
CLOUDSTACK-737
     add xenserver support in UI
     only XenServer and KVM clusters are allowed in security enabled zone.
     only shared security enabled networks are allowed in security enabled zone.
 CLOUDSTACK-737
         support multiple NICs in Security group in java side
CLOUDSTACK-737
         Security Group script assume there is only one nic per VM, it is a big task to support multiple NICs, may seperate that as another project
Merge branch 'sg-in-advanced-zone'

Conflicts:
	server/src/com/cloud/network/NetworkManagerImpl.java
	server/src/com/cloud/vm/UserVmManagerImpl.java