AT send delay set to 0 in port probings

[Aleksander Morgado]

Hey Dan, Brent and everyone,

The first patch in the series updates the send-delay settings for the Altair, Option HSO and Samsung plugins, which were already using send-delay 0 once the modem was created, but not during the probing phase.

The second patch sets up send-delay 0 for the u-blox plugin (both during probing and once the modem has been created), so that the SARA-U260 can be properly detected.

    [PATCH 1/2] altair,hso,samsung: setup send-delay=0 for probing
    [PATCH 2/2] ublox: use send-delay=0 by default

Brent, could you apply the ublox patch and see if you get the modem now properly detected?

Cheers!