Remove plugins I don't believe are in use, or planned to be in use.
We can add back as needed.

job-dsl was installed manually previously, now included in the list.

Switch to a newer Jenkins, stable (LTS) version.

These are dependencies of other modules we need

Discovered by reading the startup logs (some things had never worked).

more missing plugins and upgrades

SOL-2037: Make sure ssh private keys are not leaked into the jenkins job logs

add role for configuring android worker

SOL-2032: Theming broken for "From Scratch" AMI builds

Clean up bootstrap script

Switch back to Ruby 1.9.3

Revert "Update sandbox ami"

Revert "Update devstack base box" 

Removing dangling reference

Update devstack base box

Adding automated to edxapp and discovery plays

Update sandbox ami

neo4j_3_fixes

Update to Ruby 2.3.0 for forums.

Adding task to install github private RSA key in go-server

Configure header_checks and sender_canonical_maps.

Increase timeout for package checker to avoid intermittent failures

Remove ORA1 references

use Open edX in the motd, and delete unneeded variables

Don't install `/edx/bin/update` on devstacks.