Merge pull request #177 from jeremyschulman/fix_176

fix #176
Merge branch 'fix_176' of https://github.com/jeremyschulman/py-junos-eznc into 178
Fixed SRX Cluster Fact Unit tests

Fixed issue with test and added coverage for fix delivered in #178
Merge pull request #1 from shermdog/178

Fix for SRX Cluster Unit tests