silence_check and silence_client definitions should be updated to use native silencing

[cwjohnston]

Expected Behavior

The silence_check and silence_client definitions implemented in this cookbook should use the new native silencing implementation added in Sensu 0.26.

Current Behavior

The silence_check and silence_client definitions use the now-deprecated stash-based silencing pattern.

Possible Solution

Update silence_check and silence_client definitions to use new API methods. This is most likely a change which would merit a major version release.

Context

New silencing API provides functionality not available in the old stash-based pattern and is fully supported by Sensu Core.

Your Environment

• Version of this cookbook used: 3.1.2
• Version of Sensu used: 0.26
• Version of Chef used: 12.15

[cwjohnston]

Currently this enhancement is blocking release of version 4.0. Right now it's important to ship 4.0 so that folks can get their hands on newer versions of Sensu Core via the improvements in #535.

Because the changes needed here are non-trivial, I'm going to remove this issue from the 4.0 milestone and we'll reschedule it for the next appropriate release.