Bug Fix - InfraRepo not defined

Issue

The introduction of InfraRepo resource created issue if the resource repository with name InfraRepo is not mentioned.

Resolution

Parameterized wherever the checkout: InfraRepo is required. If no such parameter is defined then the default is to fallback to self. This would fix the issue to use self repo whenever the resource is not defined and would make the current pipelines to run as is. This would also provide flexibility for anyone to name the resource repository other than InfraRepo.