conftest: use python -m labgrid.remote.coordinator

Use the module invocation to start the coordinator instead of the
created wrapper script. This way we ensure that the correct coordinator
from the labgrid module in the current environment is used instead of a
possible wrapper shell script that might invoke a different coordinator.

Signed-off-by: Rouven Czerwinski <rouven@czerwinskis.de>

Author: Emantor

tests/conftest.py

@@ -147,7 +147,7 @@ def start(self):
         assert self.reader is None
 
         self.spawn = pexpect.spawn(
-            'labgrid-coordinator',
+            'python -m labgrid.remote.coordinator',
             logfile=Prefixer(sys.stdout.buffer, 'coordinator'),
             cwd=self.cwd)
         try: