e2e increase wait for application timeout

alfa-client/apps/alfa-e2e/Jenkinsfile

@@ -581,7 +581,7 @@ Void waitForHealthyApplication(String bezeichner, String application) {
 
         while (!isApplicationPresent(bezeichner, application) && countRetry < maxRetry ) {
             countRetry++
-            sh "sleep 5"
+            sh "sleep 20"
         }
 
         if (!isApplicationHealthy(bezeichner, application)) {