fix

Author: sushanb

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/internal/dp/DirectAccessInvestigator.java

@@ -47,6 +47,7 @@ public String getValue() {
     }
   }
 
+  // This is only called when direct access check fails.
   public static void investigateAndReport(
       DirectPathCompatibleTracer tracer, Throwable originalError) {
     try {

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

@@ -165,7 +165,7 @@ public static BigtableClientContext create(
 
       Optional<DirectPathCompatibleTracer> optionalTracer =
           settings.isDirectPathEnabledByDefault()
-              ? Optional.ofNullable(metrics.getDirectPathCompatibleTracer())
+              ? Optional.of(metrics.getDirectPathCompatibleTracer())
               : Optional.empty();
 
       BigtableTransportChannelProvider btTransportProvider =