contest: kunit: remove PYTHONUNBUFFERED when running kunit

Looks like kunit has output buffering problems.
Try to unset PYTHONUNBUFFERED for it.
We set it in the process to make sure we get logs without delays.

Signed-off-by: Jakub Kicinski <[email protected]>

Author: kuba-moo

contest/remote/kunit.py

@@ -148,9 +148,13 @@ def test(binfo, rinfo, config):
     if load_tgt:
         wait_loadavg(load_tgt)
 
+    penv = os.environ.copy()
+    if 'PYTHONUNBUFFERED' in penv:
+        del penv['PYTHONUNBUFFERED']
+
     process = subprocess.Popen(['./tools/testing/kunit/kunit.py', 'run', '--alltests', '--json', '--arch=x86_64'],
                                stdout=subprocess.PIPE, stderr=subprocess.PIPE,
-                               cwd=tree_path)
+                               cwd=tree_path, env=penv)
     stdout, stderr = process.communicate()
     stdout = stdout.decode("utf-8", "ignore")
     stderr = stderr.decode("utf-8", "ignore")