CSIT-506: HC Test- Update and cleanup all suites

 - remove EXPECTED_FAILING tag from IPv4 neighbor, IPv6 address, MTU
 - fix bridge domain removal with interfaces assigned, it should fail
 - fix teardown of L2 FIB suite (bridge domain removal, see above)
 - disable vhost-user "server" test cases (VPP bug)
 - fix keyword verifying sub-interface state
 - update ACL test data (yang model changes)
 - remove EXPECTED_FAILING tag from ACL table removal test
 - update Jira IDs and comments in failing Lisp test case
 - remove EXPECTED_FAILING tag from Lisp removal test case
 - use vhost-user "client" instead of "server" in persistence tests

Change-Id: I32eafb6013b4512090c0d9365e10c61029179d49
Signed-off-by: selias <samelias@cisco.com>