[RFE] Interaction with Linux Guest/Extension Agent (walinuxagent)

[anhvoms]

Current situation

Currently walinuxagent checks whether cloud-init is enabled. If yes, it will wait for cloud-init to finish provisioning. Otherwise, it will proceed with provisioning.

Impact

If walinuxagent is install/enabled in the system it will race with azure-init to accomplish provisioning.

Ideal future situation

walinuxagent should not assume provisioning if azure-init is expected to do provisioning.

**Implementation options

We should work with walinuxagent team to determine the best approach here. One option is to override the configuration in /etc/waagent.conf to ask walinuxagent to not provision at all.

Additional information

[peytonr18]

This is a work in progress, tied to #164 and a few other incoming changes.