SDL respond with not supported resultCode = UNSUPPORTED_RESOURCE for ChangeRegistration

[dsmyrnov]

Environment:
OS: Ubuntu 16.04.
ARC: PC (x86)
SDL - Tag 4.2.1 commit e98cef9
Occurrence:
Always
Preconditions:
SDL is running and HMI is connected to SDL
Application registered
Steps to reproduce:
Send ChangeRegistration with not supported ttsName (LHPLUS_PHONEMES or SILENCE)
Actual result:
SDL respond with not listed result code UNSUPPORTED_RESOURCE
Expected result:
SDL respond with listed in MOBILE_API.xml result code
Requirements: MOBILE_API.xml

[jacobkeeler]

I don't believe that these resultCode lists within individual RPCs are strictly enforced, but UNSUPPORTED_RESOURCE should be included as a potential results for the sake of clarity.

[iCollin]

Closed via #3091