gce: short_name and long_name default to mantl (#1503)
gce: short_name and long_name default to mantl (#1503)

fixes #1502
CiscoCloud/microservices-infrastructure,bitium/mantl,mantl/mantl,bitium/mantl,mantl/mantl,CiscoCloud/microservices-infrastructure,phnmnl/mantl,CiscoCloud/mantl,KaGeN101/mantl,KaGeN101/mantl,datascienceinc/mantl,sehqlr/mantl,sehqlr/mantl,CiscoCloud/mantl,phnmnl/mantl,datascienceinc/mantl