CLOUDSTACK-2334: UI > Regions > GSLB > remove lb rule from GSLB - fix a bug that passed wrong parameter to API call.
CLOUDSTACK-3914: assignToLoadBalancer - return false, when empty vmIds list is passed in
CLOUDSTACK-3862: Remove S3/Swift-backed Secondary Storage Code.
CLOUDSTACK-3904 listHosts API fails in VMware setup when virtualmachineid parameter is passed

Changes:
- Pod and Cluster can be null, modified the query to append these only if non-null
CLOUDSTACK-3337: Fix replace ACL drop-down for private gateway