Fix compilation

Author: EgorkaKulikov

utbot-framework/src/main/kotlin/org/utbot/framework/codegen/domain/context/CgContext.kt

@@ -491,7 +491,8 @@ data class CgContext(
     override lateinit var statesCache: EnvironmentFieldStateCache
     override lateinit var actual: CgVariable
     override lateinit var successfulExecutionsModels: List<UtModel>
-    override lateinit var modelIds: Map<UtModel, ModelId>
+
+    override var modelIds: Map<UtModel, ModelId> = mapOf()
 
     /**
      * This property cannot be accessed outside of test class file scope