Merge pull request #144 (increased sleep for mysql service from 10 to…

… 20)

Travis adaptions to avoid failing tests based on misconfiguration or timeouts (increased sleep for mysql service from 10 to 20)

.travis/install-and-init-db.sh

@@ -16,7 +16,7 @@ if [ ! -z "${DB}" ]; then
 
     docker pull ${DB}
     docker run -it --name=mysqld -d -e MYSQL_ALLOW_EMPTY_PASSWORD=yes -p 3306:3306 ${DB}
-    sleep 10
+    sleep 20
 
     mysql() {
         docker exec mysqld mysql "${@}"