Change java launcher to JDK for module/*

Per https://groups.google.com[]forum/#!topic/[]-discuss/NfejII_D5dA, a default launcher change broke our GAE-deployed services.

Tested in alpha with no issues.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119790722

java/com/google/domain/registry/module/backend/BUILD

@@ -46,6 +46,7 @@ java_library(
 java_binary(
     name = "backend_jar",
     create_executable = 0,
+    launcher = "//third_party/java/jdk:jdk_launcher",
     runtime_deps = [
         ":backend",
         "//java/com/google/domain/registry/monitoring/whitebox",  # MetricsTaskServlet