Remove no longer used stage-edge.edx.org.
Merge pull request #5477 from edx/nimisha/update_release_script

Remove no longer used stage-edge.edx.org.
add Solano CI.
Merge PR#3. Solano: Add post worker hook for copying artifacts.
fixed capturing screenshots
adding post worker script
fixing file log error
introduce bok-choy shards, new firefox version
re-shard lms to fix a failing test.
Add quality report capability.