Update test suites with new URI changes

This changes addresses:
   - variables updation with new URI
   - Fix minor spacing exceeding 80 characters

Change-Id: I3fa314f51d0b52e36649f0bfa605a02a3820e875
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/tests/test_inventory.robot b/tests/test_inventory.robot
index 9f23451..6b97219 100644
--- a/tests/test_inventory.robot
+++ b/tests/test_inventory.robot
@@ -81,7 +81,7 @@
 Setup The Suite
     BMC Power On
 
-    ${resp}=     Read Properties     /org/openbmc/inventory/enumerate
+    ${resp}=     Read Properties   ${INVENTORY_URI}enumerate
     Set Suite Variable     ${SYSTEM_INFO}      ${resp}
     log Dictionary      ${resp}