Improve rpc-tests.py arguments
73522a6a24b4
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Description

Improve rpc-tests.py arguments

Summary:

Backport the following commit from Bitcoin Core:

commit f8ac2479767309ca4f859e90fbeda84e639c8a72 (HEAD -> qa)
Author: John Newbery <john@johnnewbery.com>
Date:   Tue Jan 31 11:32:49 2017 -0800

    Improve rpc-tests.py arguments

    A few miscellaneous improvements to rpc-tests.py command line arguments:

     - make all arguments start with double dash for consistency
     - improve help text and output
     - add nozmq argument to explicitly exclude the ZMQ tests
     - change 'parallel' to 'jobs'

Depends on D818

Test Plan: ./qa/pull-tester/rpc-tests.py

Reviewers: deadalnix, freetrader, #bitcoin_abc, Yura

Reviewed By: deadalnix, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D819