Corrected the interface URL pattern in UT.
Corrected the interface URL pattern in UT.

Corrected the 'get-interface-list' url pattern which is getting
overlapped with other 'get-interface' details url pattern and breaking the
test cases.

Change-Id: I33d009d4bb0bd14f190309c39d08bee128743d0c
Related-Bug: #1732251

biswajit-mandal/contrail-web-controller,biswajit-mandal/contrail-web-controller,biswajit-mandal/contrail-web-controller