Replace resource.txt with resource.robot

Change-Id: I4d2afd35645880e33a31644cd717bbeae55666f0
Signed-off-by: Sandhya Somashekar <sansomas@in.ibm.com>
diff --git a/xcat/test_power_operation.robot b/xcat/test_power_operation.robot
index 7ecca59..b2155d3 100644
--- a/xcat/test_power_operation.robot
+++ b/xcat/test_power_operation.robot
@@ -1,7 +1,7 @@
 *** Settings ***
 Documentation   Module for testing BMC via XCAT.
 
-Resource        ../lib/xcat/resource.txt
+Resource        ../lib/xcat/resource.robot
 Resource        ../lib/xcat/xcat_utils.robot
 Resource        ../lib/state_manager.robot