Pin module versions in setup_requirements.txt
Pin module versions in setup_requirements.txt

Problem:
The netaddr and simplejson modules should be pinned to specific
versions.

Solution:
Pinned these 2 modules to the specific versions they were at before the
weekend, when simplejson was updated (and we haven't tested).

Fixes #105

ryan-talley/f5-cccl,f5devcentral/f5-cccl,ryan-talley/f5-cccl,richbrowne/f5-cccl,richbrowne/f5-cccl,f5devcentral/f5-cccl