Add HA test "kill keepalived, haproxy"

- also added time sync on '*' minions
  after reverting snapshot in the salt_deployed fixture;
  and after making a snapshot in the other fixtures

Change-Id: Ia5c5363bf55399422785f66e88e861c23cfab531
diff --git a/tcp_tests/fixtures/common_services_fixtures.py b/tcp_tests/fixtures/common_services_fixtures.py
index 5d4c56a..7d1c73f 100644
--- a/tcp_tests/fixtures/common_services_fixtures.py
+++ b/tcp_tests/fixtures/common_services_fixtures.py
@@ -71,6 +71,7 @@
         commands = underlay.read_template(steps_path)
         common_services_actions.install(commands)
         hardware.create_snapshot(ext.SNAPSHOT.common_services_deployed)
+        salt_deployed.sync_time()
 
     else:
         # 1. hardware environment created and powered on