Fix for #16888
We can't set the default value to something if you want the config to be relative to cachedir.

Since there is already code in apply_minion_config to take care of this we remove this, meaning now that if you set cachedir it won't break these
Merge branch '2014.7-config' of https://github.com/jacksontj/salt into jacksontj-2014.7-config
Fix broken salt ssh extension mods dir
Merge pull request #16896 from thatch45/jacksontj-2014.7-config

Merge #16889 with fixes