PHPLIB-581: Check error labels for retryable writes spec tests
PHPLIB-581: Check error labels for retryable writes spec tests

mongodb/mongo-php-library,jmikola/mongo-php-library,jmikola/mongo-php-library,mongodb/mongo-php-library,mongodb/mongo-php-library,jmikola/mongo-php-library,mongodb/mongo-php-library,jmikola/mongo-php-library-prototype,jmikola/mongo-php-library,10gen-labs/mongo-php-library-prototype