Fix: exec the java entrypoint in ash-template

[yfyf]

The bash-template correctly correctly wraps the java entrypoint in exec:

sbt-native-packager/src/main/resources/com/typesafe/sbt/packager/archetypes/bash-template

Lines 249 to 255 in 73cc27a

	execRunner "$java_cmd" \
	${java_opts[@]} \
	"${java_args[@]}" \
	-cp "$(fix_classpath "$app_classpath")" \
	"${mainclass[@]}" \
	"${app_commands[@]}" \
	"${residual_args[@]}"

sbt-native-packager/src/main/resources/com/typesafe/sbt/packager/archetypes/bash-template

Line 136 in 73cc27a

exec "$@"

however here it was missing.

This causes issues when using Docker, because exit signals are not
passed onto the java process, so e.g. Ctrl-C doesn't stop
the running application.

See here for details on why this is needed in Docker:
https://docs.docker.com/engine/reference/builder/#exec-form-entrypoint-example

[lightbend-cla-validator]

Hi @yfyf,

Thank you for your contribution! We really value the time you've taken to put this together.

Before we proceed with reviewing this pull request, please sign the Typesafe Contributors License Agreement:

http://www.lightbend.com/contribute/cla

[muuki88]

Thanks :)