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/proxy.go

@@ -30,7 +30,7 @@ import (
 )
 
 const (
-	proxyRevertTime    = 24 * time.Hour
+	proxyUseDuration   = 24 * time.Hour
 	proxySearchTimeout = 30 * time.Second
 	proxyQueryTimeout  = 10 * time.Second
 	proxyLookupWait    = 5 * time.Second