[pike] Allow to configure pool name for notifications

enable it by default with pool name 'barbican'.

This is follow-up to Id109c34b4ac0ae0250a28b570768ea64b074a173
in the release branch enabling this feature for Pike as well

Change-Id: I923e3c23cc3c5aeb95b29d8e93f6595a39b0b05b
Related-Issue: PROD-31028
2 files changed