Add LEDs test to master skip list

The LEDs development code needs restructuring and the automation test
case as well ahead. Adding this to the known skip list.

Change-Id: I70496cf7914b211c33c458a99350403ead14ab76
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/skip_list b/skip_list
index aedd681..f7ec447 100644
--- a/skip_list
+++ b/skip_list
@@ -15,3 +15,7 @@
 -e Set_valid_Mac_address
 #https://github.com/openbmc/openbmc-test-automation/issues/107
 -e Revert_old_Mac_address
+#https://github.com/openbmc/openbmc-test-automation/issues/22
+-e Validate_Heartbeat_LEDs_Test_Cases
+-e Validate_Identify_LEDs_Test_Cases
+-e Validate_Beep_LEDs_Test_Cases