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
