Fix the JarPublish init regression bug

The fixes the regression due to https://github.com/pantsbuild/pants/commit/1d86550eaa96fafcdd31eda79822caabb7a4329c#diff-33

The Python super init order is Left to Right.

Testing Done:
yes locally

 ./pants  tests/python/pants_test/tasks:jar_publish

Travis CI

https://travis-ci.org/pantsbuild/pants/builds/24832895

Bugs closed: 113

Reviewed at https://rbcommons.com/s/twitter/r/329/