[apache::php_xdebug] Fixes ShellOut cmd for zend

Fixes the bug that seemingly caused php to raise ruby errors.
[apache::php] Moves apc.ini from conf.d to mods-av

Puts apc.ini in /etc/php5/mods-available/ instead of /etc/php5/conf.d/
[apache::passenger] Fixes ShellOut cmd in attribs