EZP-22568: Also add Apache configuration & use for travis tests

As a addition to nginx config witch is work in progress in #123, this adds one for apache

Note:
- Currently fastcgi rewrite condition is enabled, would be nice to avoid having 4 sets of configurations for Apache.. @MLoureiro Do we use basic auth anywhere in tests? Rest?
- This introduces a set of variables in the configuration which can be replaced by scripts (one travis script provided), it implies that the same should be done in the nginx config, ping @yannickroger.