make new common tests warnings until repos have opted-in

[TravisEz13]

There should be a file in each repo that says which common tests the repo has passed. Those are treated as an error. Once someone gets that test passing they add the test to the file so that regressions will cause a failure.

[TravisEz13]

You can find what test is currently running using this code

function Get-PesterItName
{

  $itStackItem = (Get-PSCallStack).Where{$_.Command -eq 'It'}
  $itArgumentNameValues = $itStackItem.Arguments.TrimStart('{',' ').TrimEnd('}',' ') -split '\s*,\s*'
  $name = ($ArgumentNameValues.Where{ $_ -like 'name=*'} -split '=')[-1]
  Write-Verbose "gin: itname: $name" -Verbose
  return $name
}