Using original TBinaryProtocol from Thrift Library

Changing import statements so that we use TBinaryProtocol directly from org.apache.thrift library rather than depending on org.apache.cassandra.thrift. 

org.apache.cassandra.thrift.TBinaryProtocol was supposed to be used for all pre-thrift 0.7 based libraries.  
Now we are using thrift 0.7 as a dependency in a6x, hence it should be safe to use thrift version directly.