Verify tmpvol is empty before encrypting it
Verify tmpvol is empty before encrypting it

vityagi/azure-linux-extensions,soumyanishan/azure-linux-extensions,andyliuliming/azure-linux-extensions,bpramod/azure-linux-extensions,andyliuliming/azure-linux-extensions,vityagi/azure-linux-extensions,vityagi/azure-linux-extensions,Azure/azure-linux-extensions,bpramod/azure-linux-extensions,bpramod/azure-linux-extensions,soumyanishan/azure-linux-extensions,Azure/azure-linux-extensions,Azure/azure-linux-extensions,andyliuliming/azure-linux-extensions,vityagi/azure-linux-extensions,vityagi/azure-linux-extensions,soumyanishan/azure-linux-extensions,krkhan/azure-linux-extensions,bpramod/azure-linux-extensions,bpramod/azure-linux-extensions,Azure/azure-linux-extensions,Azure/azure-linux-extensions,soumyanishan/azure-linux-extensions,Azure/azure-linux-extensions,krkhan/azure-linux-extensions,andyliuliming/azure-linux-extensions,krkhan/azure-linux-extensions,Azure/azure-linux-extensions,krkhan/azure-linux-extensions,soumyanishan/azure-linux-extensions,vityagi/azure-linux-extensions,bpramod/azure-linux-extensions,bpramod/azure-linux-extensions,vityagi/azure-linux-extensions