Nexus values update

Package Merge Request

Package Changes

Setting the nexus metrics user creation job to true by default. The Job is conditional on monitoring, so it can be templated similarly.

There is documentation to support this change in the package MR below. Ultimately this should provide an out-of-the-box method for successful serviceMonitor authentication - with additional steps the enhance security of Nexus by allowing the Nexus admin credentials to be removed from the cluster.

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/developer-tools/nexus/-/merge_requests/80/commits

For Issue

Relates to https://repo1.dso.mil/platform-one/big-bang/apps/developer-tools/nexus/-/issues/52