HPCC-12735 Prevent duplicate IPs for computers

		- ConfigMgr won't create duplicate computers with same IP
		- Configgen will filter duplicates

Signed-off-by: Gleb Aronsky <gleb.aronsky@lexisnexis.com>
	PCC-12735 Prevent duplicate IPs for computers

		- Use HashMap for improved performance

Signed-off-by: Gleb Aronsky <gleb.aronsky@lexisnexis.com>
Merge pull request #6749 from garonsky/HPCC-12735_prevent_dup_ips

HPCC-12735 Prevent duplicate IPs for computers

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>