add paver test for bok-choy default command.
Set paver command tests to run as part of unit test lib suites.
Merge pull request #5118 from edx/benp/paver-tests

Add tests for paver bok_choy commands
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.