Fixing unit tests for client manager.

* [x] pmapi: refresh auth uid won't change
* [x] bridge tests:
    * update mocks
    * delete auth when FinishLogin fails
    * check for mailbox password
    * add `gomock.InOrder` for better test control
* [x] fix linter issues except TODOs
* [x] make rootScheme unexported
* [x] store tests: update mocks

pkg/pmapi/config_local.go

@@ -28,7 +28,7 @@ func init() {
 	// Use port above 1000 which doesn't need root access to start anything on it.
 	// Now the port is rounded pi. :-)
 	RootURL = "127.0.0.1:3142/api"
-	RootScheme = "http"
+	rootScheme = "http"
 
 	// TLS certificate is self-signed
 	defaultTransport = &http.Transport{