Extend schema and start Unit test implementation

Does not compile and work yet

pkg/archive/clusterConfig_test.go

@@ -0,0 +1,15 @@
+// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+package archive
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestClusterConfig(t *testing.T) {
+	var fsa FsArchive
+	version, err := fsa.Init(json.RawMessage("{\"path\":\"testdata/archive\"}"))
+}