Fix mysql port and docs

Probably the last update to this role, because it's split in multiple roles:

• repository
• agent
• server
• web

and so on.

Username and restart

The default username has been fixes, and restarting of httpd will be done on installation of the web package.

ssl

It's okay to have invalid (localhost) certs.

vars to defaults

The variable httpd_package was listed in vars, now in defaults. Like ansible-role-ca, should be able to inherit that variable from ansible-role-httpd.

API fixes

1.4.7

mode y to d typos.

Prepared for provisioning

Many changes, mostly in testing and fixing things found in tests.

Added a mechanism to provision group and hosts in zabbix.

MySQL dependency

Install a few mysql dependencies.

Get selinux out

Depend on the selinux role.

Release version bump

4.0.1 -> 4.0.2

Typo _zabbix_server_requirments

Stupid typo, cause server to be not working.