[ONOS-7544]: Possible fix for FUNCoptical non-executed test cases

Change-Id: I016c5149a44910df59a402f6f68f9ce71728edc9
diff --git a/TestON/tests/FUNC/FUNCoptical/FUNCoptical.py b/TestON/tests/FUNC/FUNCoptical/FUNCoptical.py
index 2b63a64..c688fba 100644
--- a/TestON/tests/FUNC/FUNCoptical/FUNCoptical.py
+++ b/TestON/tests/FUNC/FUNCoptical/FUNCoptical.py
@@ -83,7 +83,7 @@
             - Connect to cli
         """
         main.flowCompiler = "Flow Rules"
-        main.testSetUp.ONOSSetUp( main.Cluster, True, mininetIp=main.LincOE )
+        main.testSetUp.ONOSSetUp( main.Cluster, True, mininetIp=main.LincOE.ip_address )
 
     def CASE10( self, main ):
         """