Merge pull request #1520 from edx/derf/notifier_theme_support

add theme support for notifier role, simply notifier enviornment config
removing application log sync
Merge pull request #1521 from edx/jarv/log-sync

removing application log sync
update validation tasks to match new subdirs on platform.
Merge pull request #1523 from edx/benp/update-bokchoy-subdirs

update validation tasks to match new subdirs on platform.