Almost all vixutils tests
finished vixutils tests, 3 not working
work on testing vix driver partial
set-up methods for image_cache and disk_manager
Tests for image_cache and disk_manager
git driver tests finished
typo fix
Merge pull request #4 from ader1990/ader_tests_all

Added tests for image_cache and disk_manager
pep8 on all the tests plus comment mods
Merge branch 'unittests' of https://github.com/trobert2/nova-vix-driver into typo_fix