Increase the seed wait_for network timeout
Increase the seed wait_for network timeout

At only 10 seconds I'm seeing occasional timeouts
on this seed network wait_for. Increasing to 20
seems to reliably solve it for me.

Change-Id: I5a902c2aa0f8b09354d14a47071b75a5e9c3e40d

rdo-management/tripleo,rdo-management/tripleo