Throw Exception when hash of config cannot be computed

Author: LEDfan

src/main/java/eu/openanalytics/containerproxy/backend/kubernetes/KubernetesBackend.java

@@ -141,7 +141,7 @@ public void initialize() throws ContainerProxyException {
 		try {
 			log.info("Hash of config is: " + getInstanceId());
 		} catch(Exception e) {
-			e.printStackTrace();
+			throw new RuntimeException("Cannot compute hash of config", e);
 		}
 	}