Adding extra tests to cover acktools module.

Signed-off-by: Rob Dobson <rob@rdobson.co.uk>
Merge pull request #32 from rdobson/acktools_tests

Adding extra tests to cover acktools module.
Changed tabs into spaces and removed unnecessary tailing spaces.
Merge pull request #36 from bpwook/plugin-space-fix

Changed tabs into spaces and removed unnecessary tailing spaces in plugin.
ethtool change.