add support for multiple kinds of application deployment

[Ladicek]

Currently, the TS only supports one kind of application deployment: oc apply -f target/kubernetes/openshift.yml + oc start-build --from-dir=target --follow. We need to support more:

• -Dquarkus.container-image.build and -Dquarkus.kubernetes.deploy (test Quarkus image build and deployment as well #15)
• S2I-less deployments (no tracking issue)
• S2I source builds (no tracking issue)
• testing external applications, such as quickstarts (no tracking issue)

Some of these might be done (at least provisionally) using lifecycle hooks (currently have @AdditionalResources and @BeforeApplicationDeployment, but more is possible).