[Git] Add getBranchesContainsTag method

This method allow to get branch list which contains selected tag

Related-Prod: PRODX-3456
Change-Id: I9acc737b86a060327bc8dc43bfed704ddb282532
diff --git a/src/com/mirantis/mk/Git.groovy b/src/com/mirantis/mk/Git.groovy
index a5203f5..667e43c 100644
--- a/src/com/mirantis/mk/Git.groovy
+++ b/src/com/mirantis/mk/Git.groovy
@@ -619,3 +619,25 @@
     }
     return jsonChange
 }
+
+/**
+ * Return array with branches that contains specific tag
+ *
+ * @param path            Path to the git repository
+ * @param tag             search tag
+ */
+def getBranchesContainsTag(String path, String tag) {
+    List result = []
+    dir(path) {
+        def gitResult = sh (
+            script: "git branch --all --contains tags/${tag}",
+            returnStdout: true
+        )
+        for (line in gitResult.split('\n')) {
+            if (! line.contains("HEAD detached")) {
+                result.add(line.trim().replaceAll('remotes/origin/', ''))
+            }
+        }
+    }
+    return result
+}