prep: Initialization should wait instead of exit the servers. (#2872)

- Servers do not exit for invalid credentials instead they print and wait.
- Servers do not exit for version mismatch instead they print and wait.
- Servers do not exit for time differences between nodes they print and wait.

cmd/storage-rpc-client.go

@@ -81,6 +81,14 @@ func toStorageErr(err error) error {
 		return errCorruptedFormat
 	case errUnformattedDisk.Error():
 		return errUnformattedDisk
+	case errInvalidAccessKeyID.Error():
+		return errInvalidAccessKeyID
+	case errAuthentication.Error():
+		return errAuthentication
+	case errServerVersionMismatch.Error():
+		return errServerVersionMismatch
+	case errServerTimeMismatch.Error():
+		return errServerTimeMismatch
 	}
 	return err
 }