added mock for ClientJS

Signed-off-by: Sascha Pfeiffer <sascha.pfeiffer@psono.com>

Author: Sascha Pfeiffer

src/setupTests.js

@@ -3,4 +3,8 @@ const localStorageMock = {
     setItem: jest.fn(),
     clear: jest.fn()
 };
-global.localStorage = localStorageMock;
+global.localStorage = localStorageMock;
+
+jest.mock('./services/clientjs', () => ({
+    getFingerprint: () => { return 'dummy_fingerprint' }
+}));