Rename metric tasks/max_retries to tasks/failed_max_retries

Change-Id: Ie7cc2eb17c9cd6d0c788b12845bf569ad6e71ee9

src/main/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationQueueMetrics.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationQueueMetrics.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationQueueMetrics.java
index 2d40264..741927f 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationQueueMetrics.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationQueueMetrics.java
@@ -161,7 +161,7 @@
     tasksCancelledMaxRetries =
         registerMetric(
             metricMaker.newCounter(
-                "tasks/max_retries",
+                "tasks/failed_max_retries",
                 new Description("Replication tasks cancelled for maximum number of retries")
                     .setCumulative()
                     .setUnit(TASKS),

src/main/resources/Documentation/metrics.md

diff --git a/src/main/resources/Documentation/metrics.md b/src/main/resources/Documentation/metrics.md
index d957574..6fd6cf2 100644
--- a/src/main/resources/Documentation/metrics.md
+++ b/src/main/resources/Documentation/metrics.md
@@ -56,7 +56,7 @@
 - `merged`: (counter) number of tasks not being executed because they had
   been consolidated with an existing scheduled task.
 
-- `max_retries`: (counter) number of tasks that have reached their maximum
+- `failed_max_retries`: (counter) number of tasks that have reached their maximum
   retry count but never succeeded.
 
 ### plugins/@PLUGIN@