Correct location of ansible log file

The ansible output file will be under UUID/work/logs directory.

Change-Id: Ia2d86e5ad8d9984a9c9ef378a9cfb941a96546f4
diff --git a/zuul/lib/log_streamer.py b/zuul/lib/log_streamer.py
index e00a89b..59d5240 100644
--- a/zuul/lib/log_streamer.py
+++ b/zuul/lib/log_streamer.py
@@ -95,7 +95,7 @@
             return
 
         # check if log file exists
-        log_file = os.path.join(job_dir, 'ansible', 'job-output.txt')
+        log_file = os.path.join(job_dir, 'work', 'logs', 'job-output.txt')
         if not os.path.exists(log_file):
             msg = 'Log not found for build ID %s' % build_uuid
             self.request.sendall(msg.encode("utf-8"))