BUG/MINOR: contrib/prometheus-exporter: Rename some metrics

The following metrics have been renamed without the "_http" part :

 * http_queue_time_average_seconds     => queue_time_average_seconds
 * http_connect_time_average_seconds   => connect_time_average_seconds
 * http_response_time_average_seconds  => response_time_average_seconds
 * http_total_time_average_seconds     => total_time_average_seconds

These metrics are reported per backend and per server and are not specific to
HTTP sessions.

(cherry picked from commit 68b6968ecd4e265526cbef28bdd8ba7c941ce7bf)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/contrib/prometheus-exporter/service-prometheus.c b/contrib/prometheus-exporter/service-prometheus.c
index 1991823..a657d11 100644
--- a/contrib/prometheus-exporter/service-prometheus.c
+++ b/contrib/prometheus-exporter/service-prometheus.c
@@ -556,10 +556,10 @@
 	[ST_F_LASTSESS]       = IST("last_session_seconds"),
 	[ST_F_LAST_CHK]       = IST("check_last_content"),
 	[ST_F_LAST_AGT]       = IST("agentcheck_last_content"),
-	[ST_F_QTIME]          = IST("http_queue_time_average_seconds"),
-	[ST_F_CTIME]          = IST("http_connect_time_average_seconds"),
-	[ST_F_RTIME]          = IST("http_response_time_average_seconds"),
-	[ST_F_TTIME]          = IST("http_total_time_average_seconds"),
+	[ST_F_QTIME]          = IST("queue_time_average_seconds"),
+	[ST_F_CTIME]          = IST("connect_time_average_seconds"),
+	[ST_F_RTIME]          = IST("response_time_average_seconds"),
+	[ST_F_TTIME]          = IST("total_time_average_seconds"),
 	[ST_F_AGENT_STATUS]   = IST("agentcheck_status"),
 	[ST_F_AGENT_CODE]     = IST("agentcheck_code"),
 	[ST_F_AGENT_DURATION] = IST("agentcheck_duration_milliseconds"),