Add tenant/ user id to volume usage notifications

Volume usage notifications are generated to enable traffic based billing
on volumes. Include tenant id and user id to make these notifications
more useful to billing systems.

Fixes bug # 1158292

Change-Id: Ic71c10f0fc5d9e8c5a0e2f538de072e7ccca20ee
Merge remote-tracking branch 'm_src_repo/citrix-fixes' into build-temp