Create an inner class for LXD variables #792
Description
What needs to get done
An inner class to store some of the nitty-gritty LXD variables should be made in the lxd module.
Why it needs to get done
A few methods (in particular, craft_providers/lxd/launcher.py:launch) have enormous parameter lists. A wrapper class to store a lot of the related variables and reduce the number of parameters passed around between internal function calls would improve code clarity.