[#68288026] Now we use ContactSerializer

Still not working properly
[#68288026] Forgot to check if email and telephone were in select array

also add except attribute
[#68288026] when unscoped

attributes that are related to accounts are not going to be serialized
[##68288026] Send :mode to contact.as_json
[#68288026] :mode and primary attributes

i) Now as_json receives :mode as parameter

ii) new methods for accessing primary attributes
[##68288026] Some bugs and refactor of code  beacuse of primary attributes
[#68288026] Fix Spec: Now we send :mode as a parameter
[#68288026] Fix specs: Primary attributes