gstlal tests raise SyntaxError on python3.6
The gstlal/tests/test_common.py
script raises a SyntaxError
on python3.6:
$ python3.6 tests/test_common.py
File "tests/test_common.py", line 148
def need_data(elem, arg, (input_arrays, rate)):
^
SyntaxError: invalid syntax