David Moreau Simard d3a30a01e1
General improvements to configure-unbound role
- Improve README
- Improve integration test coverage
- Prefix variable names with "unbound_" to avoid clashes between
  different roles
- Unbound will very likely be installed but don't assume it is.
  Add an assertion to fail early if it isn't.

Change-Id: Ib8ca105938afdc0ccb1f524df3cae916c845efb8
2017-11-28 11:52:30 -05:00
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