issue #107, Remove the Action of without owner.

When remove the "User", to remove the "access_list" together, but don't remove "actions". 
When displaying the "actions", to display only the "actions" that the user(owner) is exists. 
To delete the "actions", run the deletion process on a cyclic(example:3600sec(1h)), 
to remove an "actions" if there is no owner user.However, USER_ID_SYSTEM is excluded .
How about initializing 'actionId' to avoid unexpected behavior (bug) when we use it wrongly.
If this variable is substituted soon after this line, it's not necessary.

Or define this variable near the place at which it's actually used. In this case, it in a 'for' block.