Tweak the registrar-ote-setup web console

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=227736173

java/google/registry/ui/server/registrar/RegistrarConsoleModule.java

@@ -53,4 +53,10 @@ public final class RegistrarConsoleModule {
   static String provideEmail(HttpServletRequest req) {
     return extractRequiredParameter(req, "email");
   }
+
+  @Provides
+  @Parameter("password")
+  static Optional<String> provideOptionalPassword(HttpServletRequest req) {
+    return extractOptionalParameter(req, "password");
+  }
 }