Make 'packages' a local variable
Make 'packages' a local variable

We need to remove as many global variables from main() as possible,
so we can simplify the code in dlrn/shell.py and move parts of it
to separate files.

Change-Id: I5b483ce8d55d88de1a205995262b4646ed6be858

openstack-packages/DLRN,openstack-packages/delorean,openstack-packages/DLRN,openstack-packages/delorean