rethinkdb port and permissions

src/freedombone-app-turtl

     rm $TURTL_BASE_DIR/quicklisp_install
 
     install_rethinkdb
+    echo "http-port=8091" > /etc/rethinkdb/instances.d/turtl.conf
+    chown -R rethinkdb:rethinkdb /var/lib/rethinkdb
 
     # install turtl API
     cd $TURTL_BASE_DIR/