NetconfAccess: reuse netconf libyang context

Change-Id: Ib8d4b35ddd0ecc24e9ff4066e10eaf71eb175bee
diff --git a/src/yang_schema.hpp b/src/yang_schema.hpp
index 7fcd58c..1ff5144 100644
--- a/src/yang_schema.hpp
+++ b/src/yang_schema.hpp
@@ -27,6 +27,7 @@
 class YangSchema : public Schema {
 public:
     YangSchema();
+    YangSchema(std::shared_ptr<libyang::Context> lyCtx);
     ~YangSchema() override;
 
     bool isContainer(const schemaPath_& location, const ModuleNodePair& node) const override;