Merge branch 'release/version-0.2.6' into develop
[stratio-deep release finish] next snapshot version 0.2.7-SNAPSHOT
Added original cqlTypeName to CellValidator
Added cobertura plugin
Improved support for Cell objects with null value
[stratio-deep release prepare] preparing for version 0.2.7
[Updated ChangeLog.txt for release 0.2.7]
Merge branch 'release/version-0.2.7'