Do not kickstart a new workflow if there is a running workflow

Change-Id: If42e3580999b51563df8427aa5393da2260a9fc2
diff --git a/package.json b/package.json
index b43adb4..c575553 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "cord_workflow_controller",
-    "version": "0.5.0",
+    "version": "0.5.1",
     "description": "CORD Workflow Controller",
     "main": "src/server.js",
     "scripts": {