Add a way to set custom validity per type in Tokens

https://github.com/dereuromark/cakephp-tools/blob/master/docs/Model/Tokens.md#security-notes

Login links should not be WEEK by default, as might others
So here a static model prop is not gonna work out

We need to set maybe the validity directly into the records per row?
Then it can be customized per type via configure and read from there when saving.
Only if null, use default one (WEEK)