Fix flaky test
Fix flaky test

Don't do encode/decode testing with multi-value maps, the order is not
predictable.

DataDog/sarama,vrischmann/sarama,HelixEducation/sarama,remerge/sarama,Shopify/sarama,mailgun/sarama,raisemarketplace/sarama,scalingdata/sarama,remerge/sarama,vrischmann/sarama,scalingdata/sarama,HelixEducation/sarama,DataDog/sarama,Shopify/sarama,VividCortex/sarama,VividCortex/sarama,mailgun/sarama,raisemarketplace/sarama