Fixes Hyper-V agent security groups disabling

Adds a check if the security groups have been disabled and removes
the switch port's ACLs accordingly.

Change-Id: I20d716a3f182b8ea62da6b436b150aa9dafdb1c5
Closes-Bug: #1299156
(cherry picked from commit 6d49834976bc08d2b8f7939bc2a217f5cc81db47)
Merge "Fixes Hyper-V agent security groups disabling" into stable/icehouse