Added shebang to all python scripts

test/__init__.py

test/streaming-sim/LineProtocolGenerator.py

test/streaming-sim/StreamingSim.py

test/streaming-sim/VerifySimResults.py

test/streaming-sim/__init__.py

test/streaming-sim/conftest.py

test/streaming-sim/test_rspec.py

test/streaming/__init__.py

test/streaming/conftest.py

test/streaming/test_rspec.py