tests: fix conditional that was skipping all basic python tests

[tyhicks]

A conditional added in ec6f45a was incorrectly comparing the (empty)
stdout of grep -q against 0, which always evaluated to be true and
skipped the basic python tests.

Fix it by using bash's pattern matching.

Signed-off-by: Tyler Hicks [email protected]

[tyhicks]

As mentioned in #90, the CI tests fail here due to a timeout:

The job exceeded the maximum time limit for jobs, and has been terminated.

When running the tests locally without and then with this change, I see that the four basic python tests are ran and succeed. Those tests are 11-basic-basic_errors.py, 13-basic-attrs.py, 15-basic-resolver.py, and 31-basic-version_check.py.

[pcmoore]

This seems to work for everything except for test 38-basic-pfc_coverage, which is still skipped:

./regression -b 38-basic-pfc_coverage
=============== Tue Sep 12 18:37:27 EDT 2017 ===============
Regression Test Report ("regression -b 38-basic-pfc_coverage")
 batch name: 38-basic-pfc_coverage
 test mode:  c
 test type:  basic
Test 38-basic-pfc_coverage%%001-00001 result:   SUCCESS
 batch name: 38-basic-pfc_coverage
 test mode:  python
 test type:  basic
Test 38-basic-pfc_coverage%%001-00001 result:   SKIPPED (only valid in native/c mode)
Regression Test Summary
 tests run: 1
 tests skipped: 1
 tests passed: 1
 tests failed: 0
 tests errored: 0
============================================================

I haven't done much debugging on this yet, but wanted to mention it in case you ran across something like this after the PR was posted.

[pcmoore]

Ah, wait, nevermind, my mistake ... this looks fine, I was just a bit rusty and looking at this wrong, sorry for the confusion.

[pcmoore]

Merged via b503129