Make opkg.del_repo be compatible with pkrepo state module
Make opkg.del_repo be compatible with pkrepo state module

Pkgrepo state module is using a named argument when calling pkg.del_repo.
Change the name of the argument from 'alias' to 'repo' and update all
other functions to be consistent on naming.

Signed-off-by: Cristian Hotea <0e2ba8a45bba2e48d5f43b2ba300e2383d8e329a@ni.com>

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt