Fixed the module-instances command to return a paginated
list of instances. Also added a --count_only flag to the
command to return a summary of the applied instances
based on the MD5 of the module (this is most useful
for live_update modules, to see which ones haven't been
updated).
Also cleaned up the code a bit, putting some methods
into files where they made more sense (and would cause
less potential collisions during import).
Change-Id: I963e0f03875a1b93e2e1214bcb6580c507fa45fe
Closes-Bug: #1554900
a9a4ae4bba