Set default AllowLegacyAPIProp value to false

Author: cYKatherine

src/main/java/com/uid2/operator/vertx/UIDOperatorVerticle.java

@@ -184,7 +184,7 @@ public UIDOperatorVerticle(IConfigService configService,
         this.saltRetrievalResponseHandler = saltRetrievalResponseHandler;
         this.optOutStatusApiEnabled = config.getBoolean(Const.Config.OptOutStatusApiEnabled, true);
         this.optOutStatusMaxRequestSize = config.getInteger(Const.Config.OptOutStatusMaxRequestSize, 5000);
-        this.allowLegacyAPI = config.getBoolean(Const.Config.AllowLegacyAPIProp, true);
+        this.allowLegacyAPI = config.getBoolean(Const.Config.AllowLegacyAPIProp, false);
         this.identityV3Enabled = config.getBoolean(IdentityV3Prop, false);
         this.disableOptoutToken = config.getBoolean(DisableOptoutTokenProp, false);
     }