Restructure of pester test layout

This restructuring moves tests to a directory name which matches the module
in which the cmdlet resides which should improve the discoverability of a
specific test.
For tests which are not about cmdlets in a module, new directories have been
created to make those tests easier to find as well

test/powershell/Modules/Microsoft.PowerShell.Utility/Wait-Event.Tests.ps1

@@ -0,0 +1,15 @@
+Describe "Wait-Event" {
+
+    Context "Validate Wait-Event is waiting for events" {
+	It "Should time out when it does not receive a FakeEvent" {
+	    # Don't depend on Measure-Command
+$stopwatch = [System.Diagnostics.Stopwatch]::startNew()
+# Testing the the timeout, so wait for an event that will never be
+# raised because it is fake
+Wait-Event -Timeout 1 -SourceIdentifier "FakeEvent"
+$stopwatch.Stop()
+$stopwatch.ElapsedMilliseconds | Should BeGreaterThan 500
+$stopwatch.ElapsedMilliseconds | Should BeLessThan 1500
+}
+}
+}