Initial configuration to use Aquillian / Graphene

1. Add maven dependencies to arquillain graphene
2. Initial configuration of a example of acceptance test
Merge remote-tracking branch 'upstream/master'
Addition of messages of feedback on SectorController actions

1. Exclude of the validation classes that are not used anymore
2. Addition of validation of uniqueness for Sector name
3. Update of sector form/list html
4. Update of singleCheckboxField tag
5. Remotion of warnings of some classes (rawtipes , unused imports )
Addition of changelog for the unique constrains of the Sector name
Remove of the unique constrains on Sector name
Merge pull request #98 from efraimgentil/master

Validation on sector, form refactor, feedback messages on SectorController