Initial work on jenkins backend

Signed-off-by: Andrew Shirley <andrew.shirley@sainsburys.co.uk>
Signed-off-by: blam <ben@blam.sh>

plugins/jenkins/package.json

@@ -39,7 +39,6 @@
     "@material-ui/core": "^4.11.0",
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "4.0.0-alpha.45",
-    "jenkins": "^0.28.0",
     "luxon": "^1.25.0",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",