configurehood: Fix "wifi" blocking correct network status detection

In commit 5c1d3b1f, conditions were changed so that "wifi" is called
almost every run directly before the network status (internet vs.
gateway contact vs. wXsta).

This causes strange effects configurehood and nodewatcher, which is
called at the same time.

The fix only does "wifi" if required and waits 10 sec. after that.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Reviewed-by: Christian Dresel <fff@chrisi01.de>