tests: Fix getFreeTCPUDPPort
tests: Fix getFreeTCPUDPPort

If the udp port is in use don not return error but continue the loop.

siepkes/stolon,sgotti/stolon,smkingsoft/stolon,sorintlab/stolon,siepkes/stolon,smkingsoft/stolon,sgotti/stolon,sorintlab/stolon