xml generator test: string parameters can be set to an empty value

Signed-off-by: David Wagner <[email protected]>

Author: dawagner

test/xml-generator/testVector/first.pfw

@@ -15,7 +15,8 @@ domainGroup: EddGroup
 
 				component: /Test/test/block/1
 					q2.5 = 1.2
-					string = some string
+					# set to an empty string
+					string =
 
 			# Inherits from "EddGroup" domainGroup, "First" domain
 			# and from "Green" confGroup

test/xml-generator/testVector/reference.xml

@@ -94,7 +94,7 @@
           <FixedPointParameter Name="q2.5">1.18750</FixedPointParameter>
         </ConfigurableElement>
         <ConfigurableElement Path="/Test/test/block/1/string">
-          <StringParameter Name="string">some string</StringParameter>
+          <StringParameter Name="string"></StringParameter>
         </ConfigurableElement>
       </Configuration>
       <Configuration Name="Green.Off">