fix: only record retry count when it's > 0 (#1488)

* fix: only record retry count when it's > 0

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google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/metrics/BuiltinMetricsTracer.java

@@ -232,7 +232,11 @@ private void recordOperationCompletion(@Nullable Throwable status) {
     operationTimer.stop();
     long operationLatency = operationTimer.elapsed(TimeUnit.MILLISECONDS);
 
-    recorder.putRetryCount(attemptCount - 1);
+    // Only record when retry count is greater than 0 so the retry
+    // graph will be less confusing
+    if (attemptCount > 1) {
+      recorder.putRetryCount(attemptCount - 1);
+    }
 
     // serverLatencyTimer should already be stopped in recordAttemptCompletion
     recorder.putOperationLatencies(operationLatency);

google-cloud-bigtable/src/test/java/com/google/cloud/bigtable/data/v2/it/BuiltinMetricsIT.java

@@ -48,7 +48,6 @@ public class BuiltinMetricsIT {
 
   public static String[] VIEWS = {
     "operation_latencies",
-    "retry_count",
     "attempt_latencies",
     "connectivity_error_count",
     "application_blocking_latencies"