H2 database file for message store and andes context store added to pack.

master-datasources.xml file updated.
utf-8 encoding property added to pom.xml to remove warning in maven build
embedded H2 db updated. (bindings table column routing_key is changed to binding_info)

MessageContentRemovalTask added to log4j properties and zookeeper related entries removed.
Cassandra datareader feature added. This is needed to connect to external Cassandra datasource
master data sources file updated
Merge pull request #39 from Asitha/jdbc-integration

Storage integration