Symlink /var/lib/jenkins to /mnt/jenkins to avoid running out of disk space

space

a potporri of edx-west fixes

remove direct modulestore from preview config

add a ansible_debug role that just dumps vars into json

rsyslog should log to {{log_bas_dir}}

* /mnt/logs crept into the common recipes, when logs should be written
  to wherever {{log_base_dir}} says

Removed mongodb server from package list as it isn't required for xqueue

WIP: Jenkins Provision Updates

Added more Jenkins plugins (CopyArtifact and dependencies)
Standardized task names to include role
Small style fix for github_pr_auth.py

change quoting for hash and adding ENGINE to DATABASES

Updated mongo role to be more flexible for different deployment scenarios

Added host parameter in the testing process of forum role

making lms/preview/cms ports env vars

Ensure the xqueue user and home directories exist.

Jarv/edxapp mixedmodule

Consolidate requirements.txt into a single file.

Stop referencing non-existent vars file.

Feanil/flatten vars

Conflicts:
	playbooks/roles/jenkins/defaults/main.yml