patch_namespaced_custom_object only accepts `merge-patch+json` patch type

[rodrigovalin]

The patch_namespaced_custom_object function will only accept patches of type merge-patch+json as can be seen in here:

https://github.com/kubernetes-client/python/blob/master/kubernetes/client/apis/custom_objects_api.py#L2038

It should also be possible to specify a json-patch+json object, that is what kubectl patch uses.

[tomplus]

It's already fixed here: kubernetes-client/gen#119 and it should be generated in the next release of the library.