Improve application.yml

- Remove deprecated property
- Append server config

core/core-api/src/main/resources/application.yml

@@ -8,9 +8,15 @@ spring:
       - logging.yml
       - db-core.yml
       - client-example.yml
-  mvc.throw-exception-if-no-handler-found: true
   web.resources.add-mappings: false
 
+server:
+  tomcat:
+    max-connections: 20000
+    threads:
+      max: 600
+      min-spare: 100
+
 ---
 spring.config.activate.on-profile: local