[FAQ] Enhancement and updates

[djowalker]

• Full frontend refactoring about FAQ
• Introduce FAQSettings to use redirection (for example satisfaction on all FAQ)
• More unit tests
• Fixing search trouble when a classified sentences is deleted, refactoring and testing the code for aggragation search and add a filter ClassifiedSentences status because the BuildWorker update the sentences each 1s.
• Adding a fix to work on DocumentDB when using aggregation pipeline request for FAQ
• Show MISSING_UTTERANCE in frontend when a FAQ has no more classified sentences associated.
• FAQ will use story name and description instead of the actual intention name and description : to avoid trouble with shared intents
• Some more unit test in frontend
• Add Display Unknown sentences only in FAQ Training

[vsct-jburet]

@djowalker is it still a draft?

[djowalker]

@vsct-jburet Yes, there are others new things to merge in it.

[djowalker]

@vsct-jburet : There are also database update on faq_definition We add an applicationId in the collection.

[djowalker]

@vsct-jburet : the PR should be ok for this week.

[djowalker]

3 more things that are going to be added in this PR :

• FAQ will use story label instead of the actual intention name
• Some more unit test in frontend
• Add Display Unknown sentences only in FAQ Training

[djowalker]

• FAQ will use story label instead of the actual intention name : will be added this week.

[djowalker]

@vsct-jburet ready for review

[djowalker]

@vsct-jburet : There was a trouble with the tests in Messenger, but you upgrade the version recently so i added the fix from Master in this branch

[vsct-jburet]

LGTM, thank you !