Refactor metric value conversion to store result in a variable before pushing to metrics

Author: saurabh3460

codebundles/aws-c7n-service-usage/sli.robot

@@ -27,7 +27,8 @@ Check for AWS Service Usage Exceeding defined threshold in AWS Account `${AWS_AC
     ...    secret__aws_secret_access_key=${AWS_SECRET_ACCESS_KEY}
     ${count}=     RW.CLI.Run Cli
     ...    cmd=cat ${OUTPUT_DIR}/aws-c7n-service-usage/service-usage/metadata.json | jq '.metrics[] | select(.MetricName == "ResourceCount") | .Value'
-    RW.Core.Push Metric    Convert to Number    ${count.stdout}    2
+    ${score}=    Convert to Number    ${count.stdout}    2
+    RW.Core.Push Metric    ${score}    
 
 ** Keywords ***
 Suite Initialization