Upgrade cql driver to 1.0.8 and cassandra version to 1.2.13.wso2v5

Conflicts:
	features/cassandra/client/org.wso2.carbon.cassandra.datareader.feature/pom.xml
*Above have been resolved.

This change upgrades cql driver dependency to 1.0.8 and the cassandra dependency to 1.2.13.wso2v5.

Guava version also upgraded from 14.0.1 to 16.0.1 to match the new dependencies.