Update collections.c
Update collections.c

Segmentation fault. Corrected by removing the line cass_cluster_set_protocol_version(cluster, 2);

datastax/cpp-driver,mikefero/cpp-driver,hpcc-systems/cpp-driver,mikefero/cpp-driver,mikefero/cpp-driver,hpcc-systems/cpp-driver,datastax/cpp-driver,hpcc-systems/cpp-driver,datastax/cpp-driver,mikefero/cpp-driver,datastax/cpp-driver,hpcc-systems/cpp-driver,mikefero/cpp-driver