…_ruby2.6

pdksync - (CONT-677) - set rubocop target to 2.6

In the next puppetlabs-stdlib major version this function will be
dropped. Native Puppet is used instead.

Remove has_key usage

Prior to this commit, postgresql module had allowed installations of
puppetlabs-stdlib versions < 5.2.0. This was incorrect as this module
references a type "Stdlib::IP::Address::V6::CIDR" that was released with
stdlib v5.2.0.

This commit bumps the dependency of puppetlabs/stdlib in metadata.json
to versions >= 5.2.0.

(CONT-949) - Bump stdlib dependency

Resolves an issue introduced during the syntax update carried out in
this module.
The parameter $value in config_entry, can be either a String, Integer or Float.
However, it was wrongly set to exclude Floating point numbers.

This commit adds functionality to allow an array of $listen_addresses to
be specified as a string containing a comma-seperated list of addresses,
which was removed unintentioanlly in #1397.

Fixes #1426.

…_types

(CONT-950) - Fix mismatched data types

Fixes a bug where non-array values passed to 'object_name' did not work
and returned unknown variable "$_togrant_object_only".

The correcting of this bug means the temporary fix to disable strict
checking can now be removed.

(CONT-904) - Removal of tech debt

Release prep v9.0.2