Fix contrib package name under debian 10

[neomilium]

Under Debian Buster, when we use only debian repo (ie. without using postgresql repo), the PostgreSQL contrib package postgresql-contrib-11 does not exist, only postgresql-contrib is available.

This PR fixes the wrong package name.

Note: Without this fix patch, module usage does not fail during puppet run, instead it notices the following message every run:

Notice: /Stage[main]/Postgresql::Server::Contrib/Package[postgresql-contrib]/ensure: created (corrective)

IMHO, this behavior is due to some magic done by apt, here the log when I run manually the install with the wrong package name:

$ sudo apt install postgresql-contrib-11
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Note, selecting 'postgresql-11' instead of 'postgresql-contrib-11'
postgresql-11 is already the newest version (11.7-0+deb10u1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

[puppet-community-rangefinder]

postgresql::params is a class

Breaking changes to this file MAY impact these 3 modules (near match):

• puppetfinland-trac
• maestrodev-continuum
• puppetfinland-bacula

This module is declared in 71 of 575 indexed public Puppetfiles.

---

These results were generated with Rangefinder, a tool that helps predict the downstream impact of breaking changes to elements used in Puppet modules. You can run this on the command line to get a full report.

Exact matches are those that we can positively identify via namespace and the declaring modules' metadata. Non-namespaced items, such as Puppet 3.x functions, will always be reported as near matches only.

[sanfrancrisko]

Thanks for this fix @neomilium and for the detailed explanation of the issue. This change LGTM!

Could I ask if you could rebase your branch with puppetlabs:main - I tried to do this to pull in a workaround for the current failing CI tests, but I do not have permission to push to your fork.

The tests will automatically kick off again and then I'll merge when we've got the green light 😃

[neomilium]

@sanfrancrisko Branch rebased, have fun!

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@648c135). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1188   +/-   ##
=======================================
  Coverage        ?   65.81%           
=======================================
  Files           ?       14           
  Lines           ?      351           
  Branches        ?        0           
=======================================
  Hits            ?      231           
  Misses          ?      120           
  Partials        ?        0           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 648c135...baa0091. Read the comment docs.