Replace resource.txt with resource.robot

Change-Id: I4d2afd35645880e33a31644cd717bbeae55666f0
Signed-off-by: Sandhya Somashekar <sansomas@in.ibm.com>
diff --git a/data/variables.py b/data/variables.py
index 872c4e9..3473d1d 100755
--- a/data/variables.py
+++ b/data/variables.py
@@ -165,7 +165,7 @@
 '''
   QEMU HTTPS variable:
 
-  By default lib/resource.txt AUTH URI construct is as
+  By default lib/resource.robot AUTH URI construct is as
   ${AUTH_URI}   https://${OPENBMC_HOST}${AUTH_SUFFIX}
   ${AUTH_SUFFIX} is populated here by default EMPTY else
   the port from the OS environment