fix(java): add -ntp flag to native image testing command (#1299) (#150)

Source-Link: googleapis/synthtool@723f3ce Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-java:latest@sha256:a4d7b2cfc6a9d6b378a6b2458740eae15fcab28854bd23dad3a15102d2e47c87 Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -1,3 +1,3 @@
 docker:
  image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
- digest: sha256:5b8c790f57cca57e6b37ba25f79291265c218cea3e6ba9714b001910ab3f1419
+ digest: sha256:a4d7b2cfc6a9d6b378a6b2458740eae15fcab28854bd23dad3a15102d2e47c87

.kokoro/build.sh

@@ -71,7 +71,7 @@ integration)
  ;;
 graalvm)
  # Run Unit and Integration Tests with Native Image
- mvn test -Pnative -Penable-integration-tests
+ mvn -ntp -Pnative -Penable-integration-tests test
  RETURN_CODE=$?
  ;;
 samples)