Add option --non_live_versions to set_num_instances command

This commit introduced a new flag to enable SetNumInstancesCommand to
be able to set the number of instances for all non-live versions for
a given service or for all deployed services.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=222826003

java/google/registry/tools/RegistryToolComponent.java

@@ -46,6 +46,7 @@ import javax.inject.Singleton;
 @Singleton
 @Component(
     modules = {
+      AppEngineAdminApiModule.class,
       AppEngineServiceUtilsModule.class,
       // TODO(b/36866706): Find a way to replace this with a command-line friendly version
       AuthModule.class,