Fixed HHVM-159: Remove request_id from Manager::__debugInfo()
Fixed HHVM-159: Remove request_id from Manager::__debugInfo()

mongodb-labs/mongo-hhvm-driver-prototype,jmikola/mongo-hhvm-driver,jmikola/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver,10gen-labs/mongo-hhvm-driver-prototype,jmikola/mongo-hhvm-driver-prototype,jmikola/mongo-hhvm-driver,mongodb-labs/mongo-hhvm-driver,10gen-labs/mongo-hhvm-driver-prototype,mongodb-labs/mongo-hhvm-driver-prototype,mongodb-labs/mongo-hhvm-driver-prototype,jmikola/mongo-hhvm-driver-prototype,mongodb/mongo-hhvm-driver,jmikola/mongo-hhvm-driver-prototype,mongodb-labs/mongo-hhvm-driver,10gen-labs/mongo-hhvm-driver-prototype,mongodb-labs/mongo-hhvm-driver,10gen-labs/mongo-hhvm-driver-prototype,mongodb/mongo-hhvm-driver,jmikola/mongo-hhvm-driver-prototype,mongodb-labs/mongo-hhvm-driver-prototype,jmikola/mongo-hhvm-driver,mongodb/mongo-hhvm-driver,mongodb/mongo-hhvm-driver