CLOUDSTACK-212: Move api response classes to cloud-api under org.apache.cloudstack

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
server: Cosmetic fix for methodname in ApiDispatcher

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
api: Rename Validator to Validate, cosmetic fixes

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
server: Reformat DomainChecker

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>