fix(model-sync-lib): fixed import stats not being reset

Author: mhuster23

model-sync-lib/src/main/kotlin/org/modelix/model/sync/ImportStats.kt

@@ -38,6 +38,12 @@ class ImportStats {
 
     fun getTotal() : Int = additions.size + deletions.size + moves.size + propertyChanges.size + referenceChanges.size
 
+    fun reset() {
+        listOf(additions, deletions, moves, propertyChanges, referenceChanges).forEach {
+            (it as MutableList).clear()
+        }
+    }
+
 }
 
 interface NodeChange {

model-sync-lib/src/main/kotlin/org/modelix/model/sync/ModelImporter.kt

@@ -16,6 +16,8 @@ class ModelImporter(private val root: INode, val stats: ImportStats? = null) {
     }
 
     fun import(data: ModelData) {
+        stats?.reset()
+
         syncProperties(root, data.root) // root original id is required for following operations
         val allExistingNodes = root.getDescendants(true).toList()
         val originalIdToSpec: MutableMap<String, NodeData> = buildSpecIndex(data.root)