Adding a test case to test multiple CIDR rules with duplicate
VNs

This test tests a policy with multiple rules where the VN's are
same whereas the CIDR in the rules differ. Bug - 1392545 :: ACL
duplicate rule check does not consider CIDR addresses - was
reported against this issue.

Change-Id: I350f5c4ab15b78c3a53a76d0279094c59c077115
Merge "Adding a test case to test multiple CIDR rules with duplicate VNs"