vivian/discover_vdut: increase the discovery timeout to 240s
It may take a lot longer than 150s for an emulated DUT to show up, so let's bump the discovery timeout to the same value as the state check timeout.
Reference: #187 (closed)
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It may take a lot longer than 150s for an emulated DUT to show up, so let's bump the discovery timeout to the same value as the state check timeout.
Reference: #187 (closed)