Callback API

A Customer can define the callback API URI for every process that is enabled by the system to send information to users using a callback API, All MVNE platform customers, Enterprise, Reseller, Enterprise under Reseller, Reseller under Reseller, Enterprise under Reseller under Reseller.
When we define a new process to be used by callback we should define if the process is related/used by Reseller or/and Enterprise. Then the process should be listed only for those account types.