use installInfra function

* use installInfra
* Added separated step for deploy keepalived and rabbitMQ.
* Fixed etcd check.

installInfra function is capable to detect targets and install only
required services.

installOpenstackInfra and installKubernetesInfra are now obsolete

Change-Id: I5159acf7ba27b253b1eed2f2aa390635a8a2f9ae
diff --git a/src/com/mirantis/mk/Salt.groovy b/src/com/mirantis/mk/Salt.groovy
index e8017ad..8183252 100644
--- a/src/com/mirantis/mk/Salt.groovy
+++ b/src/com/mirantis/mk/Salt.groovy
@@ -228,7 +228,7 @@
  * Test if there are any minions to target
  * @param master Salt connection object
  * @param target Target to test
- * @return bool indicating in target was succesful
+ * @return bool indicating if target was succesful
  */
 
 def testTarget(master, target) {