8172307: Remove ununsed JVM API JVM_GetModuleByPackageName()
Summary: Remove get_module_by_package_name() etc., and unneeded test.
Reviewed-by: sspitsyn, gtriantafill
This is a small quick test suite to (provide a framework to)
verify the output of a JDK build of the langtools component.
It verifies the contents exist and are minimally functional.