Add SRRoute support inside McrouterTestCase and remove dep on McDualTestCase
Add SRRoute support inside McrouterTestCase and remove dep on McDualTestCase

Summary: As above

Reviewed By: margolei

Differential Revision: D27255797

fbshipit-source-id: c1f32e9d3c3a94f1a69bf74769b1b470637577ec

facebook/mcrouter,facebook/mcrouter,facebook/mcrouter,facebook/mcrouter