Upgrade `requests` module to 2.3.0
Upgrade `oauthlib` module to 0.6.3
Merge pull request #1 from edx/master

up to date
add some vars for smtp backend

add some vars for smtp backend
Update AUTHORS
Update AUTHORS
Migrate all enabled service variants databases
allows overriding ssh user
refactoring key handling for redhat variants.
Merge pull request #34 from apardo/staging

Staging
Merge pull request #35 from apardo/staging

fix hostname
Merge pull request #36 from apardo/staging

fix hostname
Merge pull request #37 from apardo/staging

fix hostname
fix merge
fix merge
adding wait timeout for xqueue
adding wait param to other calls
Merge pull request #1319 from edx/jarv/add-wait-timeout

Jarv/add wait timeout
Update the commoncluster play to remove repeats.
Merge pull request #1320 from edx/feanil/update_commoncluster_play

Update the commoncluster play to remove repeats.