Remove hardcoded specs_route from conftest

[roo-oliv]

conftest assumes that specs_route will always be "/apidocs/".

This PR makes conftest to check if there is a reference to the Swagger object and if so it will pull specs_route from Swagger's config instance variable.

[coveralls]

Coverage remained the same at 82.465% when pulling 47f49c3 on allrod5:fix-conftest into 88eb5c5 on rochacbruno:master.

[roo-oliv]

@rochacbruno The code just looks for a variable named swag, have swagger = Swagger(app) and conftest won't see it and will fallback to /apidocs/ route.

As far as I know in Python it is not possible to access an object instance if there aren't any references to it at all, so if someone just code Swagger(app) and don't assign it to anything we can't inspect that.

But it may be feasible to use builtin dir() function to find any variable with any name holding a Swagger instance in the module and then inspect it. What do you think? Shall I do this or leave as it is.

[coveralls]

Coverage remained the same at 82.465% when pulling 35f1f70 on allrod5:fix-conftest into 88eb5c5 on rochacbruno:master.