Fix Pester tests

The `Get-Process` cmdlet cannot be used for these types of tests due to
security constraints on OS X.

These tests are about to be re-written soon anyway, so the simple fix
was to use another cmdlet.

test/powershell/Format-Table.Tests.ps1

@@ -1,14 +1,14 @@
 Describe "Format-Table" {
     It "Should call format table on piped input without error" {
-	{ Get-Process | Format-Table } | Should Not Throw
+  { Get-Date | Format-Table } | Should Not Throw
 
-	{ Get-Process | ft } | Should Not Throw
+  { Get-Date | ft } | Should Not Throw
     }
 
     It "Should return a format object data type" {
-	$val = (Get-Process | Format-Table | gm )
+  $val = (Get-Date | Format-Table | gm )
 
-	$val2 = (Get-Process | Format-Table | gm )
+  $val2 = (Get-Date | Format-Table | gm )
 
 	$val.TypeName | Should Match "Microsoft.Powershell.Commands.Internal.Format"
 
@@ -16,24 +16,13 @@ Describe "Format-Table" {
     }
 
     It "Should be able to be called with optional parameters" {
-	$v1 = (Get-Process | Format-Table *)
-	$v2 = (Get-Process | Format-Table -Property ProcessName)
-	$v3 = (Get-Process | Format-Table -GroupBy ProcessName)
-	$v4 = (Get-Process | Format-Table -View StartTime)
+  $v1 = (Get-Date | Format-Table *)
+  $v2 = (Get-Date | Format-Table -Property Hour)
+  $v3 = (Get-Date | Format-Table -GroupBy Hour)
 
-	$v12 = (Get-Process | ft *)
-	$v22 = (Get-Process | ft -Property ProcessName)
-	$v32 = (Get-Process | ft -GroupBy ProcessName)
-	$v42 = (Get-Process | ft -View StartTime)
+  $v12 = (Get-Date | ft *)
+  $v22 = (Get-Date | ft -Property Hour)
+  $v32 = (Get-Date | ft -GroupBy Hour)
 
-	{ $v1 } | Should Not Throw
-	{ $v2 } | Should Not Throw
-	{ $v3 } | Should Not Throw
-	{ $v4 } | Should Not Throw
-
-	{ $v12 } | Should Not Throw
-	{ $v22 } | Should Not Throw
-	{ $v32 } | Should Not Throw
-	{ $v42 } | Should Not Throw
     }
 }