lxd/instance/drivers/vm/qemu: Unexport and rename load functions
lxd/instance/drivers/vm/qemu: Unexport and rename load functions

Now that qemu implementation shares the same package as the lxc future implementation, namespace the qemu specific load functions.

Also unexports them so they externally only generic instance load functions can be used.

Signed-off-by: Thomas Parrott <6b778ce645fb0e3dde76d79eccad490955b1ae74@canonical.com>

lxc/lxd,lxc/lxd,atxwebs/lxd,lxc/lxd,lxc/lxd,hallyn/lxd,hallyn/lxd,lxc/lxd,Skarlso/lxd,mjeanson/lxd,atxwebs/lxd,stgraber/lxd,hallyn/lxd,mjeanson/lxd,stgraber/lxd,Skarlso/lxd,atxwebs/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd,Skarlso/lxd,atxwebs/lxd,stgraber/lxd,stgraber/lxd,stgraber/lxd,Skarlso/lxd,lxc/lxd,mjeanson/lxd,hallyn/lxd,hallyn/lxd,hallyn/lxd