Merge pull request #2754 from aiordache/update_Jenkins_setup

Set the base image to `dockerpinata/docker-py` in Jenkinsfile

Author: aiordache

Jenkinsfile

@@ -1,6 +1,6 @@
 #!groovy
 
-def imageNameBase = "dockerbuildbot/docker-py"
+def imageNameBase = "dockerpinata/docker-py"
 def imageNamePy2
 def imageNamePy3
 def imageDindSSH