Temporarily allow PHP 5.4, 5.5, and 5.6 continuous integration tests to fail.
Temporarily allow PHP 5.4, 5.5, and 5.6 continuous integration tests to
fail.

php-curl-class/php-curl-class,php-curl-class/php-curl-class,zachborboa/php-curl-class,php-curl-class/php-curl-class,zachborboa/php-curl-class,zachborboa/php-curl-class