update_bug.py: Check project along with series

Noticed recently that update_bug.py can end up updating the wrong
project's task to Fix Committed on a bug affecting multiple projects
because only the series is being checked.

This adds an additional check to make sure the project also matches
before setting the task to Fix Committed.

Change-Id: I817535bd84f76780be44ad21a7e4bb4abbda0135
Depends-On: https://review.opendev.org/883664
diff --git a/jeepyb/cmd/update_bug.py b/jeepyb/cmd/update_bug.py
index 31fecf7..3ded116 100644
--- a/jeepyb/cmd/update_bug.py
+++ b/jeepyb/cmd/update_bug.py
@@ -193,6 +193,7 @@
             # Look for a related task matching the series.
             for reltask in bugtask.related_tasks:
                 if (reltask.bug_target_name.endswith(series) and
+                        reltask.bug_target_name.startswith(args.project) and
                         reltask.status != u'Fix Released' and
                         task.needs_change('set_fix_committed')):
                     set_fix_committed(reltask)