Typos in the use of word "Role"

[pcarana]

Some references to objects or to the word "role" are still used as "rol". Here's a list of them:

• mx.nic.rdap.sql.model.RoleModel
  • All the queries names, except "getMainEntityRole" (eg, getDomainRol, getEntityRol, ...)
  • All the search functions (eg. getDomainEntityRol, getNameserverEntityRol, ...)
• Role.sql
  • All the queries identifiers, except "getMainEntityRole".

[TheRedTrainer]

Verified. All the Role.sql and RoleModel references to the word "role" were fixed.