added data reader feature to build and done configuration changes
added rss instance to the reposittories when doing changes on rss instances
removed com.datastax.cassandra.wso2:cql-driver:1.0.5.wso2v1 reference
added comments to rss services and classes
removed a misleading log entry.
RSS next instance selection issue is fixed
Add missing bundle defs in org.wso2.carbon.cassandra.datareader.feature
Reverting to cql-driver com.datastax.cassandra.wso2:cql-driver:1.0.5.wso2v2
from com.datastax.cassandra:cassandra-driver-core
adding native sql for data access layers to simplyfy the data access layers