[CHEF-5163] Support lazy evaluation the mount resource's options attr

set_or_return calls #call on any DelayedEvaluator on read and compares
the results against the parameter validations. This patch adds String
to the evaluation but ensure that someone reading the options value
will only ever get an Array, keeping the original contract.
Contribution information for CHEF-5163.
Turn off server related gems during travis run.
Edit/Create/Show databags locally [10-stable]

People already use a VCS as the source-of-truth for roles and cookbooks,
but with encrypted databags it's not possible to do this. This enables
creating, editing, and showing of databags (encrypted or otherwise) using
local files.