Merge pull request #566 from edx/will/devstack-base-box

Set devstack base box to empanada release (RC)
Merge remote-tracking branch 'origin/master' into rc/empanada
Merge remote-tracking branch 'origin' into rc/empanada
Merge pull request #561 from edx/rc/empanada

Rc/empanada
Merge pull request #729 from edx/jarv/focaccia

Jarv/focaccia
Merge branch 'master' into release
Merge pull request #775 from edx/feanil/release-gugelhupf

Feanil/release gugelhupf
Added option to specify migration user and changed to admin user and password vars
Add options for installing and configuring a CAS attribute mapper
Fix devstack and CI breakage.
Merge pull request #9 from ovnicraft/master

Actualizacion desde edx/master
Merge pull request #10 from ovnicraft/master

configuracion para tema
Pin devstack to the release branch of configuration.
Merge pull request #11 from ovnicraft/master

version de tema
Merge pull request #12 from ovnicraft/master

version de tema east, west
ensure python-mysqldb is installed before we attempt to create_dbs
Add missing variable MKTG_URLS in configuration
Merge pull request #900 from ionis-education-group/mktg-urls-missing

Add missing variable MKTG_URLS in configuration
Correct pre-supervisor location.
Merge pull request #899 from edx/derf/install-mysqldb-before-create_dbs

ensure python-mysqldb is installed before we attempt to create_dbs