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.Security/ExecutionPolicy.Tests.ps1

@@ -0,0 +1,24 @@
+Describe "ExecutionPolicy" {
+
+    Context "Check Get-ExecutionPolicy behavior" {
+	It "Should throw PlatformNotSupported when not on Windows" -Skip:$IsWindows {
+	    { Get-ExecutionPolicy } | Should Throw "Operation is not supported on this platform."
+	}
+
+	It "Should return Microsoft.Powershell.ExecutionPolicy PSObject on Windows" -Skip:($IsLinux -Or $IsOSX) {
+	    (Get-ExecutionPolicy).GetType() | Should Be Microsoft.Powershell.ExecutionPolicy
+	}
+    }
+
+    Context "Check Set-ExecutionPolicy behavior" {
+	It "Should throw PlatformNotSupported when not on Windows" -Skip:$IsWindows {
+	    { Set-ExecutionPolicy Unrestricted } | Should Throw "Operation is not supported on this platform."
+	}
+
+	It "Should succeed on Windows" -Skip:($IsLinux -Or $IsOSX) {
+	    # We use the Process scope to avoid affecting the system
+	    # Unrestricted is assumed "safe", otherwise these tests would not be running
+	    { Set-ExecutionPolicy -Force -Scope Process -ExecutionPolicy Unrestricted } | Should Not Throw
+	}
+    }
+}