Media type for CAMP SPF protocol

[Anish Karmarkar <anish.karmarkar@oracle.com>]

I had an AI to investigate whether CAMP's SPF protocol should use 
application/json media type or create a new one using the +json suffix.

Since the SPF protocol will introduce new semantics to the returned JSON 
messages (as SCIM does) it makes sense to use application/camp+json (or 
similar) media type. These media types are required to conform to 
application/json media type and therefore can be displayed as such by 
tools like browsers. This is exactly the reason why SCIM uses it. 
Furthermore, JSON Patch that we already use in CAMP also uses 
application/jason-patch+json media type. This is similar to how the +xml 
structured media type is used.

For more details see:
1) IETF RFC 6838 Media Type Specifications and Registration Procedures 
https://tools.ietf.org/html/rfc6838
2) IETF RFC 6839 Additional Media Type Structured Syntax Suffixes 
https://tools.ietf.org/html/rfc6839

--Anish