revert polling for 'fat' containers on 16.04
revert polling for 'fat' containers on 16.04

Previous patch-set https://review.opencontrail.org/#/c/38404/
removed the polling technique which was added to poll the status.
It was added in Ie5de608dff74de5287bfa6b9f6e4661f9c30250c

Change-Id: I335e97ccac1af70369f84d43da7b10b4215f22d5
Closes-Bug: #1742006

eonpatapon/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,eonpatapon/contrail-controller,eonpatapon/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller