ignoreHttp1xx or ignoreHttp1Xx

[thiago]

Hi, first I would like to thank you for this lib, It is been useful for us here.

Said that, I would like to discuss about a possible bug I've found. But before sending my pull request I want to discuss the best solution to fix it.

I notice that the attribute "ignoreHttp1xx" of the "healthCheck" is been converted to "ignoreHttp1Xx" with the first "X" in capital letter. Based on the Marathon scheme referenced in this link https://mesosphere.github.io/marathon/docs/generated/api.html#v2_apps_post it is a boolean and the atribute "ignoreHttp1xx" with "x" in lower case.

However marathon accepts the atribute with capital "X". I'm using marathon version 0.13.0

After analysing the results, I look into the library code and realized that the problem is in the native python string method "w.tittle()" line https://github.com/thefactory/marathon-python/blob/master/marathon/util.py#L59

I've developed one possible solution rewriting the method title and it is like this :

thiago@ddcc947

As marathon also accepts the wrong attribute, this is generating a bug in fact. I'm creating an application that stores and validate the marathon atributes according with their scheme and it's generating a bug in my application because I'm having to create a validation too specific only for this atribute.

A simple way to see this behaviour is with this python code.

. 'httpxx'.title() and then 'http1xx'.title()

Thanks