Add commit command

Change-Id: If8ff0ec34f5a187b3585ac0ff98e06fba699f809
diff --git a/src/sysrepo_access.hpp b/src/sysrepo_access.hpp
index 0a9f57b..3630961 100644
--- a/src/sysrepo_access.hpp
+++ b/src/sysrepo_access.hpp
@@ -28,6 +28,8 @@
     void createPresenceContainer(const std::string& path) override;
     void deletePresenceContainer(const std::string& path) override;
 
+    void commitChanges() override;
+
 private:
     std::shared_ptr<Connection> m_connection;
     std::shared_ptr<Session> m_session;