The dependent route list maintained by path_preference_module for a given V4 IP/prefix_len should have only V4 routes. The agent crash as reported by bug 1382378 happened because we were expecting only v4 routes in the dependent list and the list had v6 routes as well.
Added UT to ensure that dependent list has only v4 routes.
Closes-Bug: #1382378

Change-Id: I03a26fe06aa82e02821973989680e6e1ddd524e0
Merge "The dependent route list maintained by path_preference_module for a given V4 IP/prefix_len should have only V4 routes. The agent crash as reported by bug 1382378 happened because we were expecting only v4 routes in the dependent list and the list had v6 routes as well. Added UT to ensure that dependent list has only v4 routes. Closes-Bug: #1382378"