set deploymentid as unknown instead of None if deployment id not found on host
set deploymentid as unknown instead of None if deployment id not found on host

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