PHPLIB-298 Remove cursor rewind in ChangeStream constructor
PHPLIB-298 Remove cursor rewind in ChangeStream constructor

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