Replace resource.txt with resource.robot

Change-Id: I4d2afd35645880e33a31644cd717bbeae55666f0
Signed-off-by: Sandhya Somashekar <sansomas@in.ibm.com>
diff --git a/tests/test_led.robot b/tests/test_led.robot
index 7e96d31..206c4c4 100644
--- a/tests/test_led.robot
+++ b/tests/test_led.robot
@@ -4,7 +4,7 @@
 
 Resource          ../lib/rest_client.robot
 Resource          ../lib/state_manager.robot
-Resource          ../lib/resource.txt
+Resource          ../lib/resource.robot
 Resource          ../lib/openbmc_ffdc.robot
 Resource          ../lib/utils.robot