GPG Install for Debian VMs (#1570)
GPG Install for Debian VMs (#1570)

* add gpg install for debian

* fix indentation issue

* remove unnecessary install cmds
Azure/azure-linux-extensions,Azure/azure-linux-extensions,Azure/azure-linux-extensions,Azure/azure-linux-extensions,Azure/azure-linux-extensions,Azure/azure-linux-extensions,Azure/azure-linux-extensions