fix: declare all TBC stages

mentioned in commit 93cd62b8

mentioned in merge request to-be-continuous/samples/maven-on-openshift!42 (closed)

mentioned in merge request to-be-continuous/samples/maven-on-gcloud!83 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-kubernetes!95 (merged)

mentioned in merge request to-be-continuous/samples/maven-library!33 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-gcloud!84 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-kubernetes!97 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-openshift!48 (merged)