Copy spec before validation occurs

[wasbazi]

Fixes #214

Changes proposed in this pull request:

• Copies the spec and passes the copy to validator instead of passing the original spec used later in the code

[jmcs]

Thanks for the pull request. Please fix the failing unit test so we can merge the Pull Request.

[rafaelcaricio]

@wasbazi Sounds good, but you have to do:

self.specification = compatibility_layer(spec)

Because Connexion expects that the status codes to be integer value, probably that is why the tests are failing now.

[wasbazi]

Thanks for pointing out the issue with the tests, I hadn't noticed that at first and it's even easier to fix knowing what the problem is.

[coveralls]

Coverage remained the same at 100.0% when pulling bb7c68f on wasbazi:copy-before-validation into 44c5c5d on zalando:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 6614d78 on wasbazi:copy-before-validation into eecca74 on zalando:master.

[rafaelcaricio]

👍