Refactored sr app to enable rest api.

The segment routing application structure has been refactored
to the following structure :
	sr
	 ---- app
 	 ---- web

web folder contains the rest cli implementations while app folder
contains everything else. Originally I tried to split the application
in api / app / web, where api would contain all the interfaces. However,
that was not possible due to the fact that most of the classes do not implement
any interfaces and app -- api would result in circular dependencies and we would
not be able to build them.

Change-Id: Ifaaeefe2c5061c8457924ccd01678fb18966c44f
diff --git a/apps/t3/BUCK b/apps/t3/BUCK
index a37fab3..50905b2 100644
--- a/apps/t3/BUCK
+++ b/apps/t3/BUCK
@@ -7,7 +7,7 @@
     '//lib:org.apache.karaf.shell.console',
     '//cli:onos-cli',
     '//drivers/default:onos-drivers-default',
-    '//apps/segmentrouting:onos-apps-segmentrouting',
+    '//apps/segmentrouting/app:onos-apps-segmentrouting-app',
 ]
 
 TEST_DEPS = [