fix(trigger.py): Ignore commit created by user

Users might trigger tip of tree commit before trigger,
ignore them and execute our own test set.

Signed-off-by: Denys Fedoryshchenko <[email protected]>

src/trigger.py

@@ -48,6 +48,7 @@ def _run_trigger(self, build_config, force, timeout, trees):
             "kind": "checkout",
             "data.kernel_revision.commit": head_commit,
             "owner": self._current_user['username'],
+            "submitter": "service:pipeline"
         })
 
         if node_count > 0: