Set data types for puppetdb parameters

[chambersmp]

Summary:
Enable data type validation for parameters in puppetdb classes and defined types. The goal is to refine user inputs to reduce risk of misconfiguration or failure to apply.

Each data type was configured based on default values supplied within the params.pp class, unit/acceptance tests and alternative values recommended in PuppetDB docs.

Changes:

• Data types have been added to the parameters for both classes and defined types
• Stdlib types provide validation for complex inputs (e.g. Stdlib::Host, Stdlib::Port::User)
• Data values supplied by unit and acceptance tests were reviewed to ensure parameters supported expected input value types
• Unit test param inputs refined to support expected data types.

Potential for Breaking Change:

• Data type validation may render some user inputs invalid (i.e. Strings provided where Integer expected).
• To guard against this some parameters use Variant to support historical String usage with Pattern matching

Related Issues:
resolves #105

Testing:

• Mend tests are expected to fail on forked repositories due to missing secrets.
• All CI tests (unit and acceptance) are passing.

[h0tw1r3]

FWIW, I would remove the maintenance label so the change does show up in the change log and release notes.

[chambersmp]

As open_ssl_listen_port is no longer optional both params.pp and the unit test shared-examples have been updated to default to false instead of undef|nil.