WIP commit with in-progress better groovy testing impl

Change-Id: Ibe9d115fa89a037232cd040d5cd0c049e23665c7
diff --git a/src/com/mirantis/mcp/Common.groovy b/src/com/mirantis/mcp/Common.groovy
index d6a34c4..cb0ca5d 100644
--- a/src/com/mirantis/mcp/Common.groovy
+++ b/src/com/mirantis/mcp/Common.groovy
@@ -1,5 +1,6 @@
 package com.mirantis.mcp
 
+import com.cloudbees.groovy.cps.NonCPS
 @Grab(group='org.yaml', module='snakeyaml', version='1.17')
 import org.yaml.snakeyaml.Yaml