build/health-check.install: do not call add_epel_repository twice for RHEL6
build/health-check.install: do not call add_epel_repository twice for RHEL6

lebauce/edeploy,enovance/edeploy,redhat-cip/edeploy,lebauce/edeploy,lebauce/edeploy,lebauce/edeploy,enovance/edeploy,redhat-cip/edeploy,redhat-cip/edeploy,enovance/edeploy,redhat-cip/edeploy,enovance/edeploy