Update Operations to act as wrapper of wrapped view function

[RobbeSneyders]

Fixes #1666

The FlaskOperation and AsyncOperation classes act as decorators for their wrapped view functions, so their metadata should reflect this, similar to what functools.wraps does.

[coveralls]

Pull Request Test Coverage Report for Build 4341705569

• 4 of 4 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.004%) to 93.242%

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Totals
Change from base Build 4321937364:	0.004%
Covered Lines:	3270
Relevant Lines:	3507

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💛 - Coveralls

[Ruwann]

TIL about functools.update_wrapper - feels weird to apply it to a class but as long as it 'quacks' like a function :)

[RobbeSneyders]

They're not functions, but they are callables :)