Merge DatastoreAccess executeRpc and executeAction

Sysrepo now uses the same method for rpc and action.

Change-Id: I3a8211b670189c9724d46d6235e5a68b3107c81a
diff --git a/src/netconf_access.hpp b/src/netconf_access.hpp
index 45973a6..14288bc 100644
--- a/src/netconf_access.hpp
+++ b/src/netconf_access.hpp
@@ -47,8 +47,7 @@
     void moveItem(const std::string& path, std::variant<yang::move::Absolute, yang::move::Relative> move) override;
     void commitChanges() override;
     void discardChanges() override;
-    Tree executeRpc(const std::string& path, const Tree& input) override;
-    Tree executeAction(const std::string& path, const Tree& input) override;
+    Tree execute(const std::string& path, const Tree& input) override;
     void copyConfig(const Datastore source, const Datastore destination) override;
 
     std::shared_ptr<Schema> schema() override;