Merge pull request #404 from hackmann/issues146

Issue #146 - DNS Zone Import
Revert "Issue #146 - DNS Zone Import"
Merge pull request #405 from softlayer/revert-404-issues146

Revert "Issue #146 - DNS Zone Import"
Many fixes to DNS import code

Fixes tests (the existing test was failing and didn't actually test)
Fixes styling (flake8 and pylint were crying)
Moves parsing logic away from the logic to persist changes to SoftLayer