Andy Kling authored Feb 20, 2019 and Lubomir Rintel committed Jul 29, 2019

To allow completion for mesh connections channel and band need to be
set. This is only done if both values are absent. It does not check
existing values against a given ap_freq. This maybe changed to throw an
error and detect a possible conflict. Any other check is left to verify
step of connection.

This change allows to use ap freq during complete. For tests 0 is passed
as frequency for now. This needs to be changed if completion of freq
should be tested.

[lkundrak@v3.sk, thaller@redhat.com: formatting fixes]