Fix data display issue for the most expensive service on Grafana dashboard. about xc3

[muhammad-irfan-xgrid]

Reason: Reading parameter in lambda function name cost most expensive services. Error is shown below. This lambda is responsible getting most expensive services for each region and then push cost metric to Prometheus and S3 bucket. But while reading regions name it throw error give below.

[muhammad-irfan-xgrid]

Parameter Reading Error: We have to create Parameter in SSM whioch store regions name. then this issue is resolved.

[muhammad-irfan-xgrid]

Region variable issue: When we use region in query as variable than data not found. But when I test it by writing any specific region name instead of using variable. we are getting data.

[muhammad-irfan-xgrid]

Solution: Need to updated query and remove code of region name reading from SSM paramter from lambda fucntion: cost_of_most_expnesive service.
Results.

[muhammad-irfan-xgrid]

Final Solution: Don't remove any code just update query as below in json file and creaet SSM parameter with "/{namespcae}/region_names" and value should be as we ahve in "/xc3/region_names".