Add Stratum support for SRDynamicConf

- Add bmv2 switch support to cord_fabric topo file
- Fix some error handling for SR tests
- Updating testcases to run for SR Stratum tests
- Fix Tost-ONOS docker image tag for onos-2.2
- Update make command for changed variable names
- Fix expected hosts files for SRDhcprelay
    - Fix case 12 config
    - Add config for cases 3 and 4
    - Create generic files

Change-Id: I39d499baaf69eb047e261fd2d6b6f2e846707719
(cherry picked from commit c15b8dfb3093c1b693ea05227ada9a9f1c6d4afb)
diff --git a/TestON/tests/USECASE/SegmentRouting/SRBridging/dependencies/SRBridgingTest.py b/TestON/tests/USECASE/SegmentRouting/SRBridging/dependencies/SRBridgingTest.py
index a617716..c3d93be 100644
--- a/TestON/tests/USECASE/SegmentRouting/SRBridging/dependencies/SRBridgingTest.py
+++ b/TestON/tests/USECASE/SegmentRouting/SRBridging/dependencies/SRBridgingTest.py
@@ -100,5 +100,5 @@
         except Exception as e:
             main.log.exception( "Error in runTest" )
             main.skipCase( result="FAIL", msg=e )
-
-        run.cleanup( main )
+        finally:
+            run.cleanup( main )