Use a temporary datadir and non-default RPC port when testing seeds
Summary: This makes it far less likely to interfere with any nodes that may already be running.
bitcoind # running a node should not cause any issues post-patch ./test-seeds.sh < nodes_main.txt ./test-seeds.sh --testnet < nodes_test.txt ../teamcity/check-seeds.sh main 80 ../teamcity/check-seeds.sh test 80
Reviewers: #bitcoin_abc, Fabien
Reviewed By: #bitcoin_abc, Fabien
Differential Revision: https://reviews.bitcoinabc.org/D5246