forums on 16.04

Sets FORUM_API_KEY to EDXAPP_COMMENTS_SERVICE_KEY if available

Allow timer logs to go into the current working directory

Mark timing logs with their own sourcetype

Updates for 16.04 MongoDB

We need to install a mongod.service under systemd.
This requires templating a file and then enabling it for systemd.

OPS-1850: use nodeenv for edxapp

Work around using eucalyptus devstacks on master devstacks

Revert "Bump the sandbox version"

Bump the sandbox version

1.9 requires that you import * from ansible.module_utils.basic
and to_native doesn't exist in 1.9, however this works fine for
our uses on 16.04.

https://github.com/ansible/ansible-modules-core/blob/stable-2.2/system/systemd.py

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.

Roles shouldn't reach into each others' namespaces, and so this change
intentionally avoids assigning one variable to the other.

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.