adding defaults for edxapp
moving segmentio to secrets
removing limits indent
Merge pull request #1282 from edx/jarv/edxapp-defaults

adding defaults for edxapp
updating name of VIDEO_CDN_URL
Merge pull request #1283 from edx/jarv/edxapp-defaults

updating name of VIDEO_CDN_URL
change COMMON_ENABLE_BASIC_AUTH to False in the defaults of the common ansible role
Merge pull request #1286 from dhpollack/dhpollack/basic_auth_false2

COMMON_ENABLE_BASIC_AUTH to False in ansible/comment/defaults/main.yml
Merge pull request #1289 from edx/release

Release
clone script updates