refactor

[apple-x-co]

• [x] centos68
• [x] centos75
• [x] amazonlinux2
• [x] mysql56
• [x] mysql57

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• [x] amazonlinux2-apache24-php72 -> webserver-amzn2-apache24-php72:latest
• [x] amazonlinux2-apache24-php74 -> webserver-amzn2-apache24-php74:latest
• [x] centos68-apache-php56 -> webserver-centos68-apache22-php56:latest
• [x] centos68-apache-php56-memcache -> webserver-centos68-apache22-php56-memcache:latest
• [x] centos68-apache-php70 -> webserver-centos68-apache22-php70:latest
• [x] centos75-apache-php71 -> webserver-centos68-apache22-php71:latest
• [x] centos75-apache-php74 -> webserver-centos68-apache22-php74:latest
• [x] centos75-apache-php80 -> webserver-centos68-apache22-php80:latest