Fixing Snapshot tests (#1947)
Fixing Snapshot tests (#1947)

* change from Silent to SilentlyContinue

Silent just allows Exceptions to be thrown but I don't see any try
catches. This param will soon be renamed to AllowException /cc @niphlod

* Get-DbaDatabaseSnapshot tests, improved setup

sqlpadawan/dbatools,Splaxi/dbatools,kozloski/dbatools,SirCaptainMitch/dbatools,dsolodow/dbatools,wsmelton/dbatools