adding bastion role and task to setup access to the dbs from it
allowing ansible-provision to do bare installations
adding verbose flag to provision run
local action for cert and key stat before copy
sudo false for stats
adding dependency for the user role so that bastion users are installed
renaming user_info to USER_INFO
add prod-ssh to our example edx config
Stanford README: update ansible commands
Added CAS settings to edxapp
Sleep between adding aws tags.
A var for the wait time.
force set to yes for key file update
Merge pull request #856 from edx/feanil/slow_down

Sleep between adding aws tags.
Break after tagging.
Merge pull request #857 from edx/feanil/fix_abbey

Break after tagging.
Replace null reference with empty string
Update cache prefix using EDXAPP_ENV_EXTRA_VARS.
Update to have a new flag for updating the staticfiles KEY_PREFIX.
Update cms and preview env configs.