pydoop submit: fix conflicting options

[simleo]

Some options act on properties that can also be set with -D key=value, and there is no logic in place to prevent conflicts between the two settings. Together with the fact that we are still mirroring options between their Hadoop 1 and Hadoop 2 versions (see #274), this makes the actual setting dependent on dictionary iteration order in:

props = [(ctable.get(k, k), v) for (k, v) in self.properties.items()]

In particular, I saw one test pass with Python 3 and fail with Python 2 due to this.