This change causes rate limiting errors to be returned to the client
as JSON objects rather than plain text to prevent the satellite UI from
encountering issues when trying to parse them.
Resolvesstorj/customer-issues#88
Change-Id: I11abd19068927a22f1c28d18fc99e7dad8461834
Introduces a new endpoint on the satellite web server to get the
project's salt. The endpoint utilizes a new console service method
GetSalt which in turn calls the project DB GetSalt method if the
user is authorized. It returns the project salt bytes as a base64
encoded string in the response.
Change-Id: Ia13b5a4b8580e7bdad0dbb98014a276b1c74b46d