Add required dependency for RemoteApiInstaller

We got 500 Internal Server Error when calling GAE RemoteApi in Nomulus
tool. The root cause is we missed the dependency described in this
[]

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=242166362

java/google/registry/tools/server/BUILD

@@ -8,6 +8,7 @@ java_library(
     name = "server",
     srcs = glob(["*.java"]),
     deps = [
+        "//java/com/google/appengine/public:appengine-remote-api-servlet",
         "//java/google/registry/config",
         "//java/google/registry/dns",
         "//java/google/registry/export",