Exception forwarding / error message 403 (EXPOSUREAPP-8022 ) (#3524)

* Forward TestCertificateServerException

* satisfy noOne but lint

Co-authored-by: Chilja Gossow <49635654+chiljamgossow@users.noreply.github.com>

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/covidcertificate/test/core/server/TestCertificateServer.kt

@@ -68,7 +68,10 @@ class TestCertificateServer @Inject constructor(
             }
         } catch (e: Exception) {
             Timber.tag(TAG).w(e, "registerPublicKeyForTest failed")
-            throw TestCertificateServerException(PKR_FAILED)
+            throw when (e) {
+                is TestCertificateServerException -> e
+                else -> TestCertificateServerException(PKR_FAILED)
+            }
         }
     }