[LAD] Exit w/ special exit code on waagent import failure
[LAD] Exit w/ special exit code on waagent import failure

We have to exit with a special exit code if we want to see the issue quickly from the extension telemetry (which I do want).

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