Fix logging to file and summary for crashed tests

Logging was not being logged to log.txt
Crashed tests were not reported properly when running tests in one
process

Change-Id: Ica2d703d88351cc8a94bad86764ae4376dc79590
Signed-off-by: juraj.linkes <juraj.linkes@pantheon.tech>

test/log.py

@@ -59,6 +59,7 @@ def getLogger(name):
 def get_parallel_logger(stream):
     logger = logging.getLogger('parallel_logger_{}'.format(stream))
     logger.propagate = False
+    logger.setLevel(logging.DEBUG)
     handler = logging.StreamHandler(stream)
     handler.setFormatter(color_formatter)
     handler.setLevel(log_level)