Get Valid FRUs: ${fru_records}=  Filter Struct

Fix to Get Valid FRUs to set fru_records to the value returned by Filter
Struct.

Change-Id: I5a32ec3736e9a79cf95bad93cb2d3af039ff85b8
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
diff --git a/lib/bmc_redfish_utils.robot b/lib/bmc_redfish_utils.robot
index b7ea8f4..ff24182 100644
--- a/lib/bmc_redfish_utils.robot
+++ b/lib/bmc_redfish_utils.robot
@@ -84,7 +84,7 @@
 
     ${fru_records}=  Redfish_Utils.Enumerate Request
     ...  /redfish/v1/Systems/system/${fru_type}  return_json=0
-    Filter Struct  ${fru_records}  [('State', 'Enabled'), ('Health', 'OK')]
+    ${fru_records}=  Filter Struct  ${fru_records}  [('State', 'Enabled'), ('Health', 'OK')]
 
     [Return]  ${fru_records}