chore: add tests coverage

Author: yurtsevich-sbb

app/src/test/java/ch/sbb/polarion/extension/generic/configuration/GenericPolarionStatusProviderTest.java

@@ -20,7 +20,8 @@ public static Stream<Arguments> provideConfigurationStatus() {
                 Arguments.of("2410.1", "2410", configurationStatus(Status.OK, "2410.1")),
                 Arguments.of("2310", "2410", configurationStatus(Status.WARNING, "2310 is not officially supported")),
                 Arguments.of("2310.1", "2410", configurationStatus(Status.WARNING, "2310.1 is not officially supported")),
-                Arguments.of("2410", "", configurationStatus(Status.ERROR, "Officially supported version not specified"))
+                Arguments.of("2410", "", configurationStatus(Status.ERROR, "Officially supported version not specified")),
+                Arguments.of("2410", null, configurationStatus(Status.ERROR, "Officially supported version not specified"))
         );
     }