ci-fairy: ignore a missing allow_collaboration field

Where an author files an MR against their own personal project, the
allow_collaboration field is missing. This causes a KeyError, let's
catch and ignore that.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

tools/ci_fairy.py

@@ -1076,18 +1076,23 @@ def check_merge_request(ctx, project, merge_request_iid, junit_xml, require_allo
 
     if exit_status == 0:
         if require_allow_collaboration:
-            if not mr.allow_collaboration:
-                exit_status = 1
-                tcaseid = 'allow_collaboration'
-                tcasename = 'Check allow_collaboration checkbox is set'
-                message = '''
-Error: This merge request does not allow edits from maintainers.
-
-Please edit the merge request and set the checkbox to
-"Allow commits from members who can merge to the target branch"
-See https://docs.gitlab.com/ce/user/project/merge_requests/allow_collaboration.html'''
-                failures.append((tcaseid, tcasename, message))
-                logger.error(message)
+            try:
+                if not mr.allow_collaboration:
+                    exit_status = 1
+                    tcaseid = 'allow_collaboration'
+                    tcasename = 'Check allow_collaboration checkbox is set'
+                    message = '''
+    Error: This merge request does not allow edits from maintainers.
+
+    Please edit the merge request and set the checkbox to
+    "Allow commits from members who can merge to the target branch"
+    See https://docs.gitlab.com/ce/user/project/merge_requests/allow_collaboration.html'''
+                    failures.append((tcaseid, tcasename, message))
+                    logger.error(message)
+            except KeyError:
+                # filing an MR against master in your own personal repo
+                # doesn't have that checkbox
+                pass
 
     if failures:
         if junit_xml is not None: