HPCC-12244 Fix xpath used to lookup WsEcl VIP configuration

Signed-off-by: Anthony Fishbeck <anthony.fishbeck@lexisnexis.com>
Merge pull request #6449 from afishbeck/wseclVipConfig

HPCC-12244 Fix xpath used to lookup WsEcl VIP configuration

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>