Removing the PHP5 compilation from source code from the installPhp5FromSource() function since this procedure is only working for 12.04 and not 14.04

The steps to follow are available here: http://wiki.opensemanticframework.org/index.php/Recompile_PHP_with_iodbc

This should be updated eventually, but this is really not necessary now that we have the packages available for 14.04