[CORD-2913] Add Makefile to test JJB jobs locally and README describing
how to use them.

Change-Id: I663f332f8076d00a22231d7bfd535578ac3b153f
diff --git a/.gitignore b/.gitignore
index 11b529f..f07503c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,4 +29,7 @@
 __pycache__/
 *.pyc
 
-onap_sandbox
+# jjb local testing
+venv-jjb
+job-configs
+