Activating nodeenv to use bower
install tmux debian package in common role
Additional notifier vars and defaults
Merge pull request #1656 from edx/e0d/new-notifier-vars

Additional notifier vars and defaults
Update more vars that need to use $ instead of jinja.
Merge pull request #1657 from edx/feanil/update_jinja

Update more vars that need to use $ instead of jinja.
Config for new voters
Merge pull request #1643 from edx/insights-bower-fix

Activating nodeenv to use bower
mongo version check should give better errors on failure
Merge pull request #1659 from edx/derf/mongo_version_check_should_give_better_errors_on_failure

mongo version check should give better errors on failure
Merge pull request #1658 from edx/e0d/new-voters

Config for new voters
Creation of MariaDB role with galera cluster option
Create vagrant for building and testing cluster roles
Modify HAProxy defaults to match with vagrant cluster

- Also adds MariaDB and elasticsearch to default config
- Remove comments from vagrant-cluster playbook
- Add back verbosity to cluster play
- Make the serial play serial
Add vagrant_cluster var for handling eth0 in clusters
Move Ubuntu apt key server to common var
Merge pull request #1648 from jtriley/apt-install-tmux

install tmux debian package in common role
Merge pull request #1660 from mitodl/cg/add_mariadb_galera

Add MariaDB Role (with galera clustering)
the force option was not used correctly
Merge pull request #1661 from edx/jarv/fix-force

the force option was not used correctly