Revert "Allow pacman upgrade to don't refresh the database"

This reverts commit 52e065adadfdad2a4abcdf741507f373b49e3ead.
Revert "Make pacman system upgrade optional"

This reverts commit 29f6f9675b09588d344f7bc9653f167429eff375.

Conflicts:
	salt/modules/pacman.py