changed apt-get installation in one line to avoid docker trusted build cache
changed apt-get installation in one line to avoid docker trusted build cache

pchico83/mysql,jechiy/mysql,tutumcloud/tutum-docker-mysql,Carrotzpc/mysql,hasufell/docker-gentoo-mysql,westhouseproject/docker-mysql,alexmcroberts/mysql,lucienh/mysql,drasamsetti/mysql,wahyutaufik/mysql,jwjohns/tutum-docker-mysql,jarekkozak/mysql,mrojass/mysql,ball6847/mysql,pitrho/docker-mysql,tutumcloud/mysql,xiongjungit/mysql