Update OpenLDAP secrets plugin 0.1.4 -> 0.1.5

[tomhjp]

This PR upgrades the OpenLDAP secrets plugin to v0.1.5, which includes a new ad schema for managing AD instances. See hashicorp/vault-plugin-secrets-openldap#16 for the feature PR, and #9619 for the docs PR.

Upgrade was performed via:

go get github.com/hashicorp/vault-plugin-secrets-openldap
go mod vendor
go mod tidy

[jasonodonnell]

LGTM. The race condition failure seems suspicious, wondering if this is already known?

[calvn]

I think we want to do go get github.com/hashicorp/vault-plugin-secrets-openldap (without the -u) to avoid updating all downstream dependencies.

I think bumping the version in go.mod followed by go mod vendor & go mod tidy should work fine.

[tomhjp]

Thanks @calvn - I've dropped the previous commit, rebased and done as suggested (without the -u). The diff is much smaller now and looks correct to me.