Update appoptics_tracing.rb
Update appoptics_tracing.rb

Getting name based on `graphql_name` and fixing error when flattening metadata that has an array value.
nevesenin/graphql-ruby,rmosolgo/graphql-ruby,rmosolgo/graphql-ruby,nevesenin/graphql-ruby,nevesenin/graphql-ruby,rmosolgo/graphql-ruby,nevesenin/graphql-ruby,rmosolgo/graphql-ruby