Fix client.tryRefreshMetadata Println

[slaunay]

Bugfix

Println is used instead of Printf for logging in client.tryRefreshMetadata which result in a bad %s substitution and a two lines log statement (see below).
This was introduced in commit fe1b184.

Versions

Sarama	Kafka	Go
1358e9c (v1.24.0)	N/A	1.13

Logs

$ DEBUG=true go test -v -run=TestClientMetadataTimeout/timeout=250ms | grep -C 2 "not fetching
metadata"
[sarama] 2019/11/07 09:17:58 Closed connection to broker 127.0.0.1:50294
[sarama] 2019/11/07 09:17:58 ClientID is the default of 'sarama', you should consider setting it to something application-specific.
[sarama] 2019/11/07 09:17:58 client/metadata not fetching metadata from broker %s as we would go past the metadata timeout
 127.0.0.1:50295
[sarama] 2019/11/07 09:17:58 client/metadata skipping last retries as we would go past the metadata timeout

Changes

• use Printf instead of Println

Testing done

Ran the same test after applying the fix:

$ DEBUG=true go test -v -run=TestClientMetadataTimeout/timeout=250ms | grep -C 2 "not fetching metadata"
[sarama] 2019/11/07 09:18:22 Closed connection to broker 127.0.0.1:50323
[sarama] 2019/11/07 09:18:22 ClientID is the default of 'sarama', you should consider setting it to something application-specific.
[sarama] 2019/11/07 09:18:22 client/metadata not fetching metadata from broker 127.0.0.1:50324 as we would go past the metadata timeout
[sarama] 2019/11/07 09:18:22 client/metadata skipping last retries as we would go past the metadata timeout
[sarama] 2019/11/07 09:18:22 Closing Client

[bai]

Many thanks!