Work around using eucalyptus devstacks on master devstacks

Revert "Bump the sandbox version"

Bump the sandbox version

The playbook the CI job runs trips over the PPA upgrade in
https://github.com/edx/configuration/pull/3470

Switch back to ondrej's mysql PPA

Installation of python3.5 on Precise and Trusty requires adding the deadsnakes repository.

Add timing logs generated by edx-platform jenkins builds to splunk

Add default value to fix failure

Remove .npmrc from jenkins worker.

Fix openstack requirements installation

This should resolve TE-1835. The jenkins worker no longer
needs the .npmrc file in /home/jenkins due to using
nodeenv for platform builds, and the local copy of .npmrc
which is now stored in the edx-platform repo.

New ecom team scripts are written in Python 3. If we want to run them with tools-jenkins, we need Python 3 available.

ECOM-5658

[EV-73]

Feanil/retire xenial hosts

Syslog creates it lazily which causes s3 log syncing to break if this doesn't already exist.

systemd.

- Systemctl doesn't have a no-wait parameter.
- Shell instead of command to send logs to s3, command was failing on
  '||'

Updating all AMI, including the edx install

These are expanded in common.py, but too late

We have to use the full name when overriding.

Bump agent versions

Note that their URLs changed so I had to tweak the data structure.

Ensure this is available in lms.env to be overridden.

Feanil/test sandbox build

Jibsheet/programs on 16.04

Update common to pull down the non-ppa python on 16.04

(cherry picked from commit dd3c15bf019c6538ed8b83834fd2dc5b1a51a1db)

Instead of making the change just for ansible-provision.sh make the
change for all ansible runs.  Most of them don't currently have this
problem right now but I think it makes sense to make them all consistent
and not have to worry about this problem in the future.

When ansible is going over a NAT Gateway or other intermdiate
network devices, the connection can time out if that device has
its own timeout setting for no traffic.  Setting the ServerAliveInterval
will ensure that there is data sent over the wire ever 30 seconds so the
connection does not get closed while running ansible tasks that take
over 5 minutes.