testing mongodb wait script

.travis.yml

@@ -8,7 +8,7 @@ before_install:
 before_script:
   - sh -c "if [ '$DB' = 'mongodb' ]; then node app --setup=\"{\\\"url\\\":\\\"http://127.0.0.1:4567\\\",\\\"secret\\\":\\\"abcdef\\\",\\\"database\\\":\\\"mongo\\\",\\\"mongo:host\\\":\\\"127.0.0.1\\\",\\\"mongo:port\\\":27017,\\\"mongo:username\\\":\\\"\\\",\\\"mongo:password\\\":\\\"\\\",\\\"mongo:database\\\":0,\\\"redis:host\\\":\\\"127.0.0.1\\\",\\\"redis:port\\\":6379,\\\"redis:password\\\":\\\"\\\",\\\"redis:database\\\":0,\\\"admin:username\\\":\\\"admin\\\",\\\"admin:email\\\":\\\"test@example.org\\\",\\\"admin:password\\\":\\\"abcdef\\\",\\\"admin:password:confirm\\\":\\\"abcdef\\\"}\" --ci=\"{\\\"host\\\":\\\"127.0.0.1\\\",\\\"port\\\":27017,\\\"database\\\":0}\"; fi"
   - sh -c "if [ '$DB' = 'redis' ]; then node app --setup=\"{\\\"url\\\":\\\"http://127.0.0.1:4567\\\",\\\"secret\\\":\\\"abcdef\\\",\\\"database\\\":\\\"redis\\\",\\\"mongo:host\\\":\\\"127.0.0.1\\\",\\\"mongo:port\\\":27017,\\\"mongo:username\\\":\\\"\\\",\\\"mongo:password\\\":\\\"\\\",\\\"mongo:database\\\":0,\\\"redis:host\\\":\\\"127.0.0.1\\\",\\\"redis:port\\\":6379,\\\"redis:password\\\":\\\"\\\",\\\"redis:database\\\":0,\\\"admin:username\\\":\\\"admin\\\",\\\"admin:email\\\":\\\"test@example.org\\\",\\\"admin:password\\\":\\\"abcdef\\\",\\\"admin:password:confirm\\\":\\\"abcdef\\\"}\" --ci=\"{\\\"host\\\":\\\"127.0.0.1\\\",\\\"port\\\":6379,\\\"database\\\":0}\"; fi"
-  - "until nc -z localhost 27017; do echo Waiting for MongoDB; sleep 1; done"
+  - sleep 15 # wait for mongodb to be ready
 after_success:
   - "npm run coveralls"
 language: node_js