CLOUDSTACK-6364 Added ip address validation

Also updated to assign vm primary ip to lb rule when vmid is passed virtualmachineid
and vm id ip details in vmidipmap
CLOUDSTACK-6577: Disable service monitoring in RVR
CLOUDSTACK-6578: Fixed issue in delete remote access vpn command
CLOUDSTACK-6531: stopping the router in case of command failures. Also added alerts for failures.

Signed-off-by: Jayapal <jayapal@apache.org>
CLOUDSTACK-6579: used_bytes column of storage_pool table is no longer used and should be removed
For now correctly setting used_bytes. Also fixed the corresponding simulator code