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

@@ -140,10 +140,12 @@ def build_version(versionParam) {
     versionArr[0] = newVersionStr
   }
   else {
+    if(params.IMAGE_TYPE != 'fct') {
       def buildnbr = getTopUpstreamBuildNumber()
       String nightlyPart = versionArr[0] + ".Test${buildnbr}"
       versionArr[0] = nightlyPart
     }
+  }
   rlsVersion = versionArr.join("-")
   return rlsVersion
 }