Add k8s keepalived failover test

Rewrite openstack_actions to remove hardware dependency from it.
Rewrite conformance method to allow more flexibility.
Add timeout after restarting keepalived workaround because
sometimes it did not have time to go into MASTER state before
test starts.

Change-Id: I668844f91f4a8fb473e199977f1ebe6ca7ddc35a
Related-PROD: PROD-20878
diff --git a/tcp_tests/fixtures/k8s_fixtures.py b/tcp_tests/fixtures/k8s_fixtures.py
index 08176fc..f59ff61 100644
--- a/tcp_tests/fixtures/k8s_fixtures.py
+++ b/tcp_tests/fixtures/k8s_fixtures.py
@@ -13,6 +13,7 @@
 #    under the License.
 
 import pytest
+import time
 
 from tcp_tests.helpers import ext
 from tcp_tests.helpers import utils
@@ -79,7 +80,8 @@
     LOG.warning('Restarting keepalived service on controllers...')
     k8s_actions._salt.local(tgt='ctl*', fun='cmd.run',
                             args='systemctl restart keepalived.service')
-
+    # give some time to keepalived to enter in MASTER state
+    time.sleep(5)
     return k8s_actions