lamp_simple is incompatible with CentOS 7

[varnav]

Hello!

One of incompatibilities was fixed by #118 - but two remain:

1. There is no mysql-server package in the default repo
2. There is no iptables service, it was replaced by firewalld

This can be fixed easily, and I can do this, but that will make this example incompatible with CentOS earlier than 7. Is it worth doing this?

[varnav]

Also SElinux seems to be blocking PHP from connecting to MySQL DB.

[gregdek]

Should probably be a separate Centos 7 example...

[pypingou]

Can't you check which version of CentOS it is?

[varnav]

cat /etc/redhat-release says
CentOS Linux release 7.1.1503 (Core)

If you ok with that, I will make separate lamp_simple example for CentOS 7 and will make a merge request then. Should be quite simple.

[gregdek]

I think a separate C7 demo would be useful.

[varnav]

New PR created: #121

I've tested it on 2 machines with fresh CentOS 7.1 installs

[varnav]

PR merged, new Centos7/RHEL7 specific example added to examples.