(MODULES-6937) Mergeback release to master

This commit removes an errant pry command that was commented out.

[skip ci]

(maint) Remove errant pry command

This commit adds Server 2016 to the list of supported Windows OSes.

(MODULES-4271) Add Server 2016 to metadata

When using this module with PowerShell 2.0, the only way to use the
enhanced commonication method is to have .NET 3.5 installed.

The warning message a user received however implied that if you
installed any version higher than 3.5, such as .NET 4.0, that the
message should go away, and receiving it was a bug in the check logic,
which was testing specifically for .NET 3.5 and not >= 3.5.

Unfortunately, our testing confirmed that installing .NET 4.0 on a
machine is not enough to enable the enhanced features in the module.
Having .NET 4 installed does not automatically enable PowerShell 2 to
load the newer asseblies or use the more advanced features in that
version of the CLR. Specific steps must be taken to enable that to
happen, such as editing registry keys, or writing a
powershell.exe.config to the disk. The results of doing this are also
unpredictable.

The change in this commit updates the upgrade message returned to the
user to make it clearer that when using PowerShell 2, the only way to
enable the enhanced features is to install .NET 3.5, not 3.5+.

…fix-net-upgrade-message

(MODULES-7011) Fix .NET upgrade message

This change fixes a spec test that was giving unreliable results and erroneously
failing CI pipelines.

…kill-test-unreliable

(MODULES-7033) Kill test unreliable

Some other Puppet Exec providers will treat a `timeout` value of `0` as
an infinite timeout. We have chosen not to support an infinite timeout
in this provider, so this change will ensure that a sensible value is
used if the user passes in `0` as the timeout. It also fixes the README
documentation to make it clearer that `0` is not supported, and that
attempting to use it will result in the default timeout of 300 seconds
being used instead.

…Fix-timeout-zero-behavior

(MODULES-7018) Fix Zero Timeout Behavior

…og-to-kac

(MAINT) Update Changelog to KAC Format

…-release-prep

(MODULES-7109) Release Prep

This commit edited the changelog to follow KAC standards

(MODULES-7109) CHANGELOG edits