Code clean-up drive as per latest robot 7.x

Changes:
   - Keyword name 'Should contain' does not follow
     case convention
   - Section '*** Variables ***' is empty
   - Section variable '${poweron_flag}' name is
     not uppercase
   - Invalid number of empty lines between sections

Tested:
   - NA

Change-Id: I424640ffc0ceba82f1f13b57ae7df60e9118546f
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/xcat/test_xcat_inventory.robot b/xcat/test_xcat_inventory.robot
index c8a9f94..b9d3d80 100644
--- a/xcat/test_xcat_inventory.robot
+++ b/xcat/test_xcat_inventory.robot
@@ -7,8 +7,6 @@
 
 Suite Setup     XCAT Suite Setup
 
-*** Variables ***
-
 *** Test Cases ***
 
 Verify BMC Version Via XCAT
@@ -21,8 +19,7 @@
     # Get BMC version info via rest
     ${version_via_rest}=  Get BMC Version
 
-    Should contain  ${version_via_xcat}  ${version_via_rest}
-
+    Should Contain  ${version_via_xcat}  ${version_via_rest}
 
 *** Keywords ***