Update basic-spring-boot pipeline to use namespace names defined via applier

[bparry02]

What does this PR do?

Updates to allow the user to change the namespace names of the -build, -dev, -stage, and -prod namespaces. Before this PR, the Jenkinsfile would attempt to derive the application and build names from the -build namespace name, which would fail if applier namespace variables had been changed.

This PR does not address that namespace names are still defined in two places: .openshift/projects/projects.yml and .applier/group_vars/seed-hosts.yml.

How should this be tested?

1. Update the project request resources in .openshift/projects/projects.yml by prepending test- to all four names
2. Run the applier with additional command line vars to override the default namespace names, and refer to the branch in this PR:

ansible-playbook -i ./.applier/ galaxy/openshift-applier/playbooks/openshift-cluster-seed.yml -e sb_build_namespace=test-basic-spring-boot-build -e sb_dev_namespace=test-basic-spring-boot-dev -e sb_stage_namespace=test-basic-spring-boot-stage -e sb_prod_namespace=test-basic-spring-boot-prod -e sb_source_repository_url="https://github.com/bparry02/container-pipelines.git" -e sb_source_repository_ref=135-namespace-names

3. Verify the pipeline ran successfully

Is there a relevant Issue open for this?

Yes, resolves #135

Who would you like to review this?

cc: @redhat-cop/containers-approvers

[bparry02]

/assign @garethahealy

[garethahealy]

/lgtm
/approve

[redhat-cop-ci-bot]

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