Revert "Jenkinsfile.builchain pointing to 7.55.0.Final definition file (#1673)" (#1687)
Revert "Jenkinsfile.builchain pointing to 7.55.0.Final definition file (#1673)" (#1687)

This reverts commit 2311c2c73b5929dda6166351d001b6f50566b90c.
drdaveg/droolsjbpm-build-bootstrap,drdaveg/droolsjbpm-build-bootstrap