Remove inconsistencies in proto files

[doekermk]

Field names should be underscore_separated_names, see protobuf style guide. The file cloud-virtualized-app-registration.proto should be updated.

Compare EndpointRegistrationDetails (which is not correct)

string deviceAlternateId = 2;
string sensorAlternateId = 3;
string capabilityAlternateId = 4
string endpointId = 5;

and HeaderQueryResponse (which is correct)

string message_id = 1;
string technical_message_type = 2;  

[alex-hamm]

Is fixed.