Add parameter validation functions and enhance tests for configuration data

Private/Test-ConfigurationDataValueIsInteger.ps1

@@ -0,0 +1,20 @@
+function Test-ConfigurationDataValueIsInteger {
+    [CmdletBinding()]
+    Param(
+        [AllowNull()]
+        $Value
+    )
+
+    if($null -eq $Value -or $Value -is [bool]){
+        return $false
+    }
+
+    return ($Value -is [byte]) -or
+        ($Value -is [sbyte]) -or
+        ($Value -is [int16]) -or
+        ($Value -is [uint16]) -or
+        ($Value -is [int]) -or
+        ($Value -is [uint32]) -or
+        ($Value -is [long]) -or
+        ($Value -is [uint64])
+}