add testTarget to Orchestrate class

Change-Id: Ica01911e5fd66d162ad417ff152d03595102559b
diff --git a/src/com/mirantis/mk/Salt.groovy b/src/com/mirantis/mk/Salt.groovy
index 2c4734e..5bb9e81 100644
--- a/src/com/mirantis/mk/Salt.groovy
+++ b/src/com/mirantis/mk/Salt.groovy
@@ -225,6 +225,17 @@
 
 
 /**
+ * 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
+ */
+
+def testTarget(master, target) {
+    return getMinions(master, target).size() > 0
+}
+
+/**
  * Generates node key using key.gen_accept call
  * @param master Salt connection object
  * @param target Key generating target