Merge pull request #241 from shermdog/unit-tests

Added base tests for OpTable and CfgTable
cfgtable unit test cases
python 2.6 fix
unit tests for table.py
assert change for python 2.6
assert changes for python 2.6
assert changes for python 2.6
assert changes for python 2.6
Merge pull request #242 from vnitinv/unit-tests

Unit tests
Fixed factory/table.py for 2.6 format
Updates up to 95% coverage
factory_cls 100%