CLOUDSTACK-5701: physical size is not getting updated in snapshot_store_ref table.
CLOUDSTACK-5787:  support in-memroy eventbus

this checkin adds support for plug-in that provides an in memory event
bus which could be used as alternative to RabbitMQ based event bus. Both
publisher are subscriber should be running with management server to use
in-memroy event bus.
fixing build break due to checkstyle
CLOUDSTACK-5782. [VMware] Snapshot creation on a detached volume failes with NPE.
For a detached volume, don't try to find the associated VM on the hypervisor/peer hypervisor host.
By default create a worker VM to perform snapshot operations.

Conflicts:

	plugins/hypervisors/vmware/src/com/cloud/storage/resource/VmwareStorageProcessor.java
CLOUDSTACK-5625: removed unnecessary global setting 'ldap.realname.attribute'
compare null to non-null or not-empty-string
CLOUDSTACK-5406: Not able to take snapshot becasue of secondary_storage limit of 400 gb exceeded even though we have not really consumed this limit in secondary store.
CLOUDSTACK-5788, CLOUDSTACK-5789: Attaching upload volume and download
volume was failing for hyper-v. Copy command answer was failing while
creating the answer object. Fixing the issue.
CLOUDSTACK-5750 Make default value of execute.in.sequence.hypervisor.commands false.

Conflicts:
	engine/api/src/com/cloud/vm/VirtualMachineManager.java
CLOUDSTACK-5472 fixed the listvirtualmachines API to show cpu, memory and cpucores when using custom compute offering
add column is_exclusive_gslb_provider is duplicated causing schema-421to430.sql to fail during install or upgrade
CLOUDSTACK-5797: Fixed integration test for test_03_restore_vm_with_new_template
another issue with vlan-number vs vlan-uri
CLOUDSTACK-5780. [VMware] ESXi 5.5 - During live volume migration of ROOT and DATA volumes, suitable storage list is always empty
Update hypervisor_capabilities to include capabilities for ESXi host 5.5
CLOUDSTACK-5527: UI > accounts page > Add LDAP Account action > use plus(+) icon like Add Account action does.
check for BroadcastDomainTypes on sourceNatIp
CLOUDSTACK-5808: UI > SystemVMs page > pass details=min to listHosts API to reduce response time.
CLOUDSTACK-5771:listImageStores returns error in keyword search.
listNics API: added optional networkId parameter allowing to list nics by network id for the specific vm
CLOUDSTACK-5810: addSecondaryIp to vm's nic - derive the ip owner from the vm instance account, not from the caller