61b640073e Tests: bind to any first free TCP ports instead of hardcoded ones (Kristaps Kaupe)
Pull request description:
Without this, tests will fail if `joinmarketd` is already running in system, binding to default ports.
ACKs for top commit:
AdamISZ:
ACK 61b640073e
Tree-SHA512: f636abe3c6b14e042dfac4afbe839a4139b3a6d5d963d77691ac769f113b84051e07b232146651f6987338368a9dd3839e43b5d440e021a1b826c905ac810396