lxd/instance/test: Update TestContainer_LoadFromDB to use RenderFull for equality check
lxd/instance/test: Update TestContainer_LoadFromDB to use RenderFull for equality check

This avoids recursion limits when checking the instance.Instance structs are equal.

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

hallyn/lxd,lxc/lxd,hallyn/lxd,stgraber/lxd,hallyn/lxd,stgraber/lxd,lxc/lxd,hallyn/lxd,lxc/lxd,hallyn/lxd,stgraber/lxd,stgraber/lxd,lxc/lxd,lxc/lxd,hallyn/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd,stgraber/lxd,lxc/lxd