[behavior] Update the framework of behavior

Base on WEBQA-52, add the function that save the test result of child TCs.
Sync with sanity app, but keep the export button.

Comment: Now only the child TCs under WRT sort can show the test result.
Merge pull request #157 from jshentux/jshentux/behavior/sync-with-sanity

[behavior] Update the framework of behavior