This commit changes the travis codecoverage from using xdebug to phpdbg, phpdbg seems much faster and gives similar results.
Reason for switching is we have been running into constant timeouts on our codecoverage due to the 50min job limit on travis, which means our codecoverage has not been updated in a couple of months.
* Remove xdebug as it slows tests down, switch to using phpdbg for code coverage.
* Update parameters for phpdbg
* It is qrr not qqr
* Include vendor/bin path when using phpdbg
* Use PHP 7.1 to run phpdbg
* Update phpunit dire
* Include $HOME in phpdbg call to phpunit
* Set no memory limit to avoid out of memory errors.
* Assign timeout group to test_request_url test for paypal and do not execute that on coverage as it causes a memeory timeout. Test needs optimization to run for code coverage.
* @covers usage for methods should be prefixed with ::