[ZEPPELIN-1045] Apply new mechanism to PythonInterpreter

[minahlee]

What is this PR for?

This PR is applying new interpreter register mechanism to python interpreter.

What type of PR is it?

Improvement

What is the Jira issue?

ZEPPELIN-1045

Questions:

• Does the licenses files need update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No

[minahlee]

\cc @bzz@jongyoul for review

[bzz]

Looks great to me, thank you @minahlee !

Will merge, if there is no more discussion

[bzz]

BTW while we are here, how do you think shall we also set zeppelin.python.maxResult to 1000 in properties, propagate it to PythonInterpreter.java and document it (as with other interpreters)?

[minahlee]

@bzz Good suggestion! This will be useful to display dataframe in table view. I addressed it in 66b8f73

[bzz]

Looks awesome to me, thank you!

I think it's ready to merge, if there is no further discussion