test cases for exception,jxml and facts/personality
unit test cases for facts/ifd_style.py
unit test cases for facts/switch_style.py
Merge pull request #155 from vnitinv/unit-tests

Unit tests
Added unit attr

Added the unit attr to support flagged test runs.
Also cleaned up some PEP8
Increased test coverage for facts
Merge pull request #156 from shermdog/unit-tests

Increased test coverage for facts
Added unit tests for swver.py
Added unit tests for jxml.py
Merge pull request #157 from vnitinv/unit-tests

Unit tests
Merge pull request #159 from Juniper/unit-tests

Unit tests - Facts up to 100%