Reinitialize total_acl_count for each evaluate
Reinitialize total_acl_count for each evaluate

If all policies are removed from a network, we were not setting
the acl counts back to 0. We should initialize it to 0 before
evaluating policies.

Change-Id: Ie1575095ca117346b3deefa7fe7d22e0ed59c492
Closes-Bug: 1685458

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