chore(deps): update dependency io.vertx:vertx-unit to v3.9.1 (#2915)
chore(deps): update dependency io.vertx:vertx-unit to v3.9.1 (#2915)


GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples