Issue #302, exec jetty_cmd.sh so that signals are passed to JVM
Issue #302, exec jetty_cmd.sh so that signals are passed to JVM

GoogleCloudPlatform/openjdk-runtime,GoogleCloudPlatform/openjdk-runtime,GoogleCloudPlatform/jetty-runtime,GoogleCloudPlatform/jetty-runtime,GoogleCloudPlatform/jetty-runtime,GoogleCloudPlatform/openjdk-runtime,GoogleCloudPlatform/jetty-runtime