If we're activating the device without knowing the connection in advance, defer
servicing the requests for the secrets until we set the path.
[lkundrak@fedora20-2 ~]$ nmcli --ask c ifname wlan0
(process:18405): libnm-CRITICAL **: nm_object_get_path: assertion 'NM_IS_OBJECT (object)' failed
Error: Connection activation failed: The device has no connections available.
[lkundrak@fedora20-2 ~]$
When a connection is being activated, nmcli could ask for secrets for another
connection, which might confuse users. We check the request now and only ask
for secrets of connection being activated.
Test case:
$ nmcli con up my-ethernet0
Passwords or encryption keys are required to access the wireless network 'Red Hat'.
Warning: password for '802-1x.identity' not given in 'passwd-file' and nmcli cannot ask without '--ask' option.
