This patchset mvoes aeolus-configure to using external-nodes so the
box(es) can be describe via yaml.
Currently provides default configure/cleanup which is functionally equivalent to
the existing configure. Also provides a pair of iwhd configure/cleanup yamls to
illustrate how a smaller subset of modules can be set up.
Note that this patch implies that it may be desirable to start refactoring
the individual modules to decouple somewhat.