Move HooksController to use MongoCollection instead of direct Mongo access.

[nlutsenko]

No description provided.

[codecov-io]

Current coverage is 91.69%

Merging #844 into master will increase coverage by +0.01% as of 2c3f278

@@            master    #844   diff @@
======================================
  Files           71      71       
  Stmts         4100    4092     -8
  Branches       843     844     +1
  Methods          0       0       
======================================
- Hit           3759    3752     -7
  Partial         10      10       
+ Missed         331     330     -1

Review entire Coverage Diff as of 2c3f278

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[flovilmart]

there is a bug here, should be req.body no?

we could use deepcopy instead, or let jsonBody = Object.assign({}, req.body);