adding datanode carbinisation modified
Update HDFSDataNode.java
added code formattings for  pull 15
Update HDFSNameNodeController.java
fix breadcum issue mentioned in the SS-84
make privilege template to be required and alter validation order
Cassandra datasource initialization issue fixed
Merge pull request #64 from harsha89/SS-284

make privilege template to be required and alter validation order
Merge pull request #63 from harsha89/SS-84

fix breadcum issue mentioned in the SS-84
Merge pull request #59 from poshtha/master

HDFS Datanode carbonistion code JIRA SS-405
Merge pull request #56 from harsha89/code_formattings

added code formattings for  SS-367
Merge pull request #62 from harsha89/simplify_data_layers

simplified data access interfaces with native sql
Merge pull request #65 from indikasampath2000/snappy-java

Cassandra datasource initialization issue fixed
Revert "HDFS Datanode carbonistion code JIRA SS-405"
Merge pull request #66 from wso2-dev/revert-59-master

Revert "HDFS Datanode carbonistion code JIRA SS-405"
added improvements to logging and removed old data publisher define stream pattern
Merge pull request #67 from harsha89/improvements_monitor

added improvements to logging
modifying cassandra data reader pom and some of the test cases
Merge remote-tracking branch 'origin'
adding hector based datasource implementation and restructuring the existing cassandra datasource packaging structure