Disabling test fan use case

A tracking github is added in the skip_list for future reference.

Change-Id: I3a9d390f1667398e98686cde98847f719050bcca
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/skip_list b/skip_list
index d7980be..2ab9588 100644
--- a/skip_list
+++ b/skip_list
@@ -27,3 +27,5 @@
 -e Verify_System_VPD_Properties
 #https://github.com/openbmc/openbmc/issues/93
 -e minimal_fan_inventory
+#https://github.com/openbmc/openbmc-test-automation/issues/139
+-e Empty_Fan_Test