CLOUDSTACK-4008: fix snapshot npe if its volume is deleted
CloudStack CLOUDSTACK-3986
baremetal - create basic zone for baremetal fail - Dhcp service provider for this network does not support the dhcp across multiple subnets
CLOUDSTACK-4017:
 try to remove VDI host lock before start the VM which is using this VDI
CLOUDSTACK-3753: UI > Infrastructure > zone detail > physical network > guest > (1) remove Delete VLAN Range action. (2) change Add VLAN Range action to pass new VLAN range + exisitng VLAN range(s) to API. This is corresponding UI change to updatePhysicalNetwork API change that removevlan property has been removed and definition of vlan property has been changed.