Explicitly delete both ingress and egress acls when security group is deleted.

Change-Id: I1c814f0b52288d0e3c1531a327655dec87c9153b
Closes-Bug: 1362414
(cherry picked from commit 57c718a1adb38958f553402515923df1918903cd)
Merge "Explicitly delete both ingress and egress acls when security group is deleted." into R1.10