jenkins: fct builds do not carry the 'Test<nbr>' postfix in its version

BugzID: 70652

Signed-off-by: Marc Mattmueller <marc.mattmueller@netmodule.com>

Jenkinsfile

@@ -140,9 +140,11 @@ def build_version(versionParam) {
     versionArr[0] = newVersionStr
   }
   else {
-    def buildnbr = getTopUpstreamBuildNumber()
-    String nightlyPart = versionArr[0] + ".Test${buildnbr}"
-    versionArr[0] = nightlyPart
+    if(params.IMAGE_TYPE != 'fct') {
+      def buildnbr = getTopUpstreamBuildNumber()
+      String nightlyPart = versionArr[0] + ".Test${buildnbr}"
+      versionArr[0] = nightlyPart
+    }
   }
   rlsVersion = versionArr.join("-")
   return rlsVersion