autotest: rpc_flight_recorder: fix logging

Use the normal autotest logging behavior rather than cros_logging, so
that format is consistent with rest of autotest (and in particular, so
that logging timestamps are visible).

Also, fix a small logging incorrectness.

BUG=None
TEST=None

Change-Id: I96209aa849fcfddd729acd2242ce61c2ecad7fab
Reviewed-on: https://chromium-review.googlesource.com/989620
Commit-Ready: Jacob Kopczynski <jkop@chromium.org>
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Jacob Kopczynski <jkop@chromium.org>
diff --git a/site_utils/rpc_flight_recorder.py b/site_utils/rpc_flight_recorder.py
index 8fc7b57..72e41d6 100755
--- a/site_utils/rpc_flight_recorder.py
+++ b/site_utils/rpc_flight_recorder.py
@@ -6,6 +6,7 @@
 """Standalone service to monitor AFE servers and report to ts_mon"""
 import sys
 import time
+import logging
 import multiprocessing
 import urllib2
 
@@ -18,7 +19,6 @@
 from autotest_lib.server import site_host_attributes
 from autotest_lib.site_utils import server_manager_utils
 from chromite.lib import commandline
-from chromite.lib import cros_logging as logging
 from chromite.lib import metrics
 from chromite.lib import ts_mon_config
 
@@ -42,7 +42,7 @@
     except Exception as e:
         metrics.Counter(METRIC_MONITOR_ERROR).increment(
                 fields={'target_hostname': hostname})
-        logging.exception(e)
+        logging.exception('Exception when running against host %s', hostname)
 
 
 def update_shards(shards, shards_lock, period=600, stop_event=None):