Update Nexus test-values.yaml

Re-evaluate the current test-values.yaml in Big bang

Check for duplicate configurations that are already configured within the values itself and remove them. Add additional testing if needed.

URL: https://repo1.dso.mil/big-bang/product/packages/nexus

Default Values URL: https://repo1.dso.mil/big-bang/product/packages/nexus/-/raw/main/chart/values.yaml

BB Test Values URL: https://repo1.dso.mil/big-bang/bigbang/-/raw/master/tests/test-values.yaml

Duplicates found in addons.nexusRepositoryManager for BB Test Values:
bbtests.cypress.artifacts  =  true
nexus.env.0.name  =  INSTALL4J_ADD_VM_PARAMS
nexus.env.1.name  =  NEXUS_SECURITY_RANDOMPASSWORD
nexus.env.1.value  =  true
nexus.repository.repo.0.repo_data.cleanup.policyNames.0  =  string
nexus.repository.repo.0.repo_data.component.proprietaryComponents  =  true
nexus.repository.repo.0.repo_data.online  =  true
nexus.repository.repo.0.repo_data.storage.blobStoreName  =  default
nexus.repository.repo.0.repo_data.storage.strictContentTypeValidation  =  true
nexus.repository.repo.0.repo_data.storage.writePolicy  =  allow_once
nexus.repository.repo.0.type  =  hosted