Workaround for pip issue 1867

https://github.com/pypa/pip/issues/1867

When hash randomization is enabled, pip can return different names for
git editables from run to run.

This change accounts for that in the tests for freezed output.
Merge branch 'workaround_pip_issue_1867' of https://github.com/msabramo/pipdeptree into msabramo-workaround_pip_issue_1867
Merge branch 'msabramo-workaround_pip_issue_1867'