MODULES-9910 Release merge-back v3.1.0

(maint) Add a codeowners file

These *_ensure parameters have `Enum['present', 'absent']` as type, so
no need to compare them against `false`.

This parameter is not used anymore and was deprecated more than 2 years
ago.  2 major versions of the module where released with this
deprecation.

When set, this parameter makes the catalog compilation fail with an
error message explaining that this parameter is deprecated.  However,
when set to false or undef, no error is raised, but the default
behavior is still to install from source…

Completely remove this parameter so that setting it to any value will
produce an error.

Some rare classes previously allowed a Boolean value for these ensure
parameters.

Tomcat 8 introduced [Resources] and some settings where moved arround:

```
<!-- Tomcat 7: -->
<Context allowLinking="true" />

<!-- Tomcat 8: -->
<Context>
  <Resources allowLinking="true" />
</Context>
```

This commit introduce a new tomcat::config::server::resources defined
type which allows to configure such settings:

```
tomcat::config::server::resources { 'app resources':
  parent_host           => 'localhost',
  parent_context        => '/opt/app',
  additional_attributes => {
    allowLinking => true,
  },
}
```

[Resources]: https://tomcat.apache.org/tomcat-8.0-doc/config/resources.html

Completely remove tomcat::install_from_source

Add Resources support

Improve consistency of ensurable resources

pdksync - (maint) Override pdk gem version to master branch (PDK-1525 workaround until release)

Prior to this commit the only provisioners included in
the provision lists were docker and vmpooler, neither
of which are particularly accessible to folks developing
on Windows outside of Puppet.

This commit adds a list which leverages the vagrant
provisioner.

…dd-vagrant-provision

(FM-8275) Add vagrant provision list

Fix failing acceptance tests

pdksync - (FM-8634) ensure encrypted communication for fixtures

(FM-8699) - Addition of Support for CentOS 8

(MODULES-10120) enable simplecov; update to PDK 1.14.1; minor cleanups

pdksync - "MODULES-10242 Add ubuntu14 support back to the modules"