Updated Elasticsearch settings for discovery service

Add P3P headers to the IDAs

Secures Jenkins Analytics using Github OAuth plugin

* Configures github oauth as default jenkins auth realm (was unix system user)
* Uses the Matrix Authorization Strategy at 3 levels: anonymous, administrator,
  and job builder.
* Allows configuration of the list of users/groups and permissions granted to
  each authorization level.
* Adds ssh private key to jenkins user, to maintain CLI tool access
* Sets jenkins password only if using old unix system user realm; locks the
  jenkins system user when using github oauth.
* Adds jenkins public key to Jenkins user config.xml, and creates that user
  config.xml file if it's missing (required to bootstrap jenkins user CLI access)
* Renames the existing JENKINS_ANALYTICS_GITHUB_* credential variables to
  JENKINS_ANALYTICS_GITHUB_CREDENTIAL_* to avoid confusing them with the Github
  OAUTH variables.

* Configures github oauth as default jenkins auth realm (was unix system user)
* Uses the Matrix Authorization Strategy at 3 levels: anonymous, administrator,
  and job builder.
* Allows configuration of the list of users/groups and permissions granted to
  each authorization level.
* Adds ssh private key to jenkins user, to maintain CLI tool access
* Sets jenkins password only if using old unix system user realm; locks the
  jenkins system user when using github oauth.
* Adds jenkins public key to Jenkins user config.xml, and creates that user
  config.xml file if it's missing (required to bootstrap jenkins user CLI access)
* Renames the existing JENKINS_ANALYTICS_GITHUB_* credential variables to
  JENKINS_ANALYTICS_GITHUB_CREDENTIAL_* to avoid confusing them with the Github
  OAUTH variables.

Update Vagrantfiles for dogwood.2

Adds rebuild to the default plugins

Add documentation urls for API

make it a templated variable so that you can override it for your
installation.

Harstorage ops1372

Various fixes to allows jenkins analytics to run analytics tasks on AWS resources

* Uses JENKINS_HOME=/edx/var/jenkins.  This addresses the pyinstrument
  re-install issue seen when JENKINS_HOME is a symlink.
* Installs libffi-dev and libpq-dev packages with analytics_jenkins playbook
* Adds an SSH Credential, which is passed as the MASTER_SSH_CREDENTIAL_ID
  parameter to the seed job.
* When the seed job is run, ignore unreferenced jobs, instead of deleting them.
  This allows you to run and re-run the seed job from Jenkins to update a
  particular analytics job, and untick the jobs you don't want to update.
* Lets <ANALYTICS_TASK>_EXTRA_VARS be a @path/to/file.yml

* Uses JENKINS_HOME=/edx/var/jenkins.  This addresses the pyinstrument
  re-install issue seen when JENKINS_HOME is a symlink.
* Installs libffi-dev and libpq-dev packages with analytics_jenkins playbook
* Adds an SSH Credential, which is passed as the MASTER_SSH_CREDENTIAL_ID
  parameter to the seed job.
* When the seed job is run, ignore unreferenced jobs, instead of deleting them.
  This allows you to run and re-run the seed job from Jenkins to update a
  particular analytics job, and untick the jobs you don't want to update.
* Lets <ANALYTICS_TASK>_EXTRA_VARS be a @path/to/file.yml

Prevent invalid display courseware in IE 10+ with high privacy settings

I always miss this when we don't have it.

cleaning up my mistake

Added edxapp setting for AWS_S3_CUSTOM_DOMAIN

ECOM-4081

Updated go-agent documentation. Build examples are now correct.

Make CUSTOM_COURSES_EDX easily overridable

the go-server FQDN is now a variable passed to the playbook.

Replace nginx redirect method from rewrite to return for speeding up

Pull in hipchat 2.0.0.1 module and fix url encoding defect.

Add scripting to restore a GoCD server backup.

Install libmysqlclient-dev on go-agent docker so edx/configuration can be instaled

Disabling Boto/S3 querystring auth for edxapp

Add cluster tag as a part of abbey.py

The new code in the pipeline looks for the 'cluster' tag not the 'play' tag.  Add both for now,
we are working on a full replacement for abbey.py so this is just a shim until we can get to that.

This removes the querystring at the end of the URLs for our content uploaded to S3.

ECOM-4081

Added EDXAPP_LMS_ROOT_URL variable