Centos compatibility

[JorisVanEijden]

Add CentOS 6 compatibility.

Tested on CentOS 6.
Not working: phpmyadmin (remi phpmyadmin creates /etc/phpMyAdmin folder but role expects /etc/phpmyadmin)
Not tested: solr, mailhog

Config.yml changes I needed:
php_opcache_enabled_in_ini: false (see ansible-role-php #39)
xhprof documentroot: "/usr/share/pear/xhprof_html"

[geerlingguy]

I'm liking this a lot! One initial note (hopefully I'll get more time to go into the individual lines of code later):

I'd like to have a variable in config.yml for "OS" or something like that, and set the box based on that. Additionally, we need to switch the box for Parallels too (or just abandon those users for centos ;). That way you still never need to change the Vagrantfile and all changes are in config.yml.

[JorisVanEijden]

CentOS 7 is failing on issue ansible-role-mysql #9

[JorisVanEijden]

Ubuntu 12 is failing due to old ansible (1.4.4) on geerlingguy/ubuntu1204 box (I think).

[geerlingguy]

Let's just leave it as "Ubuntu 14.04 (by default)"

[geerlingguy]

I finally had some more time to run through all the changes, and it's looking very good—can you make the rest of the changes I noted, and then I'll work on merging and touching up anything I can to get Ubuntu 12.04 and CentOS 7 working sooner rather than later?

This is one small missing piece that's going to make Drupal VM waaaay more awesome-r!

[geerlingguy]

Since this PR was a bit off from master, I grabbed your patch, applied it, fixed all the conflicts, tested everything further, then went ahead and added a new Wiki page, where we can track specific config changes required per OS/box: Using Different Base OSes with Drupal VM.

[geerlingguy]

CentOS 7 should soon work well, too... final hurdle is almost complete: geerlingguy/ansible-role-mysql#38