Standalone server jar won't start because config value scassandra.startup-timeout-ms not set

[manuelkiessling]

How to reproduce:

• clone this repo
• build the jar with ./gradlew server:fatJar
• run the jar with java -jar ./server/build/libs/scassandra-server_2.11-0.11.1-SNAPSHOT-standalone.jar

This will result in

Exception in thread "main" java.lang.reflect.InvocationTargetException
Caused by: com.typesafe.config.ConfigException$Missing:
  No configuration setting found for key 'scassandra.startup-timeout-ms'

Environment:

• Mac OS X 10.11.3 El Capitan
• Oracle javac 1.8.0_25