Remove fuel-library puppet 3.6 and 3.7 unit jobs
Remove fuel-library puppet 3.6 and 3.7 unit jobs

This change is to remove the puppet unit test jobs from fuel library for
puppet versions 3.6 and 3.7. We are keeping testing on versions 3.3,
3.4, 3.8, and 4.

Change-Id: I66daa31ed6b5909c5356d0bf35a2c3bbbbd5ed82

openstack-infra/project-config,Tesora/tesora-project-config,noorul/os-project-config,dongwenjuan/project-config,openstack-infra/project-config,dongwenjuan/project-config,Tesora/tesora-project-config,noorul/os-project-config