[Bug] validator-whitelist contains duplicates

[14MR]

🐛 Bug Report

List of validator IP addresses contains duplicates.

Steps to Reproduce

1. Run validator
2. Check validator-whitelist:

./snarkos/node-data$ cat validator-whitelist | wc -l
67
./snarkos/node-data$ cat validator-whitelist | uniq |wc -l
65

Expected Behavior

List contains only unique IP addresses

Your Environment

SnarkOS: snarkos unknown_branch b1080b24ff45e7f5d9b5a72e6c951e2d0baa904b features=[default,snarkos_node_metrics,telemetry]