Add functions for configuration data handling and extend template merging capabilities

Private/Get-ConfigurationDataDictionaryValue.ps1

@@ -0,0 +1,22 @@
+function Get-ConfigurationDataDictionaryValue {
+    [CmdletBinding()]
+    Param(
+        [Parameter(Mandatory=$true)]
+        [System.Collections.IDictionary]
+        $Dictionary,
+
+        [Parameter(Mandatory=$true)]
+        [string]
+        $Key,
+
+        [Parameter(Mandatory=$false)]
+        [AllowNull()]
+        $DefaultValue = $null
+    )
+
+    if(Test-ConfigurationDataDictionaryKey -Dictionary $Dictionary -Key $Key){
+        return $Dictionary[$Key]
+    }
+
+    return $DefaultValue
+}