Change Docker storage driver to avoid Overlay issue

Symptom QASymphony's Postgres container (qasymphony/postgres:9.4) can't be started with the below error during startup Digest: sha256:ef0264c1500f62d0acd4d0d...3ae6ad184fcce61 Status: Image is up to date for qasymphony/postgres:9.4 container 1fab31b723b55b30d41e873f24e47...68 not running postgres cannot be started Error response from daemon: Container 1fab31b723b55b30d41e...72bd4e0ec4f8fb4b1e6768 is not running Reconfigure postgres max_connections setting... Error response from daemon: Container 1fab31b723b55b30d41e873f...e0ec4f8fb4b1e6768 is not running Restarting …