CLOUDSTACK-5492: UI > Routers > Group by zone/pod/cluster/account > (1) fix a bug that requiresUpgrade wrongly showed"No" when it should show "Yes".
(2) detailView > add new field "Total of Virtual Routers that require upgrade".
Contrail VRouter plugin major bug fixes for CS 4.3

Signed-off-by: Sheng Yang <sheng.yang@citrix.com>
Revert "Contrail VRouter plugin major bug fixes for CS 4.3"

This reverts commit dc511dd95b9099e31fa89d234af5b4e690a95643.
CLOUDSTACK-5831: UI > Volumes > take snapshot > get "quiescevm" property from listVolumes API instead of listStoragePools API since regular-user/domain-admin don't have access to listStoragePools API.