Jibsheet/tools jenkins cleanups

Swap out pylibmc for memcached caching

The jenkins role actually explicitly names files as hpi unless they're
jpi.pinned, so make this optional.  It seems to come up more if you've
upgraded plugins via the web UI.

The apt syntax which handles urls in deb: wasn't added until 2.1

Clean up after the revert, we can use the apt module

Note to clean this up

Add splunkforwarder to tools-gp

Sailthru support ecommerce_worker default values

Add email_marketing queue to ecommerce_worker celery startup

Allow builds from scratch to succeed on ubuntu 12.04

There is no need to call requirments.js since we are already installing the node/bower dependencies.

ECOM-5129

Add common role as dependency to container role

* Adds DATE_FORMAT and DATETIME_FORMAT to the analytics_api config .yml
* Adds DEFAULT_PAGE_SIZE and MAX_PAGE_SIZE variables to the analytics_api master .yml file. See https://github.com/edx/edx-analytics-data-api/pull/128 for how they're used.
* PR review: fixed page size defaults to match app

Update xqwatcher docker overrides to new format from 6fc28e55

[EV-63] Add the ability to log timing information to local logs for c…

Correctly use the Logger.exception method to capture exception backtraces if datadog timing logging fails

Only initialize formatters once, so that datadog is only initialized once, no matter how many plays are run

# The first commit's message is:

Pass playbook_timestamp into Formatters directly, rather than pulling it from callback_module

# The 2nd commit message will be skipped:

#	fixup! Pass playbook_timestamp into Formatters directly, rather than pulling it from callback_module