Implemented endpoint and query to get bandwidth chart data for new project dashboard.
Connected backend with frontend.
Storage chart data is mocked right now.
Change-Id: Ib24d28614dc74bcc31b81ee3b8aa68b9898fa87b
This change removes all the separate implementations for
`apiservice.serveJSONError()` and defines one for every service to use
in `consoleapi/common.go`.
Change-Id: Iabf184e5cba69a98eb25936ce11ebd07f02c8ff3