Fix typo in metrics export error message (#1610)

Anuraag Agrawal · web-flow · commit c325736b1664 · 2020-09-01T08:31:08.000-07:00
diff --git a/exporters/otlp/src/main/java/io/opentelemetry/exporters/otlp/OtlpGrpcMetricExporter.java b/exporters/otlp/src/main/java/io/opentelemetry/exporters/otlp/OtlpGrpcMetricExporter.java
@@ -119,7 +119,7 @@ public void onSuccess(@Nullable ExportMetricsServiceResponse response) {
 
           @Override
           public void onFailure(Throwable t) {
-            logger.log(Level.WARNING, "Failed to export spans", t);
+            logger.log(Level.WARNING, "Failed to export metrics", t);
             result.fail();
           }
         },

Original file line number	Diff line number	Diff line change
`@@ -119,7 +119,7 @@ public void onSuccess(@Nullable ExportMetricsServiceResponse response) {`
`119`	`119`
`120`	`120`	`@Override`
`121`	`121`	`public void onFailure(Throwable t) {`
`122`		`- logger.log(Level.WARNING, "Failed to export spans", t);`
	`122`	`+ logger.log(Level.WARNING, "Failed to export metrics", t);`
`123`	`123`	`result.fail();`
`124`	`124`	`}`
`125`	`125`	`},`