MINOR: Fix broken output layout of kafka-consumer-groups.sh

[sasakitoa]

Output format of kafka-consumer-groups.sh with --delete-offsets or --reset-offsets has been broken since line separators are missing.
This PR will fix the problem.

--
Current:

$ kafka-consumer-groups.sh --bootstrap-server localhost:9092 --delete-offsets --topic topic1 --group TestGroup1
Request succeed for deleting offsets with topic topic1 group TestGroup1

TOPIC                          PARTITION       STATUS         topic1                         0               Successful     topic1                         1               Successful     topic1                         2               Successful     topic1                         3               Successful     topic1                         4               Successful     topic1                         5               Successful     topic1                         6               Successful     topic1                         7               Successful     topic1                         8               Successful     topic1                         9               Successful     

Expect:

$ kafka-consumer-groups.sh --bootstrap-server localhost:9092 --delete-offsets --topic topic1 --group TestGroup1             
Request succeed for deleting offsets with topic topic1 group TestGroup1

TOPIC                          PARTITION       STATUS         
topic1                         0               Successful     
topic1                         1               Successful     
topic1                         2               Successful     
topic1                         3               Successful     
topic1                         4               Successful     
topic1                         5               Successful     
topic1                         6               Successful     
topic1                         7               Successful     
topic1                         8               Successful     
topic1                         9               Successful     

--
Current:

$ kafka-consumer-groups.sh --bootstrap-server localhost:9092 --reset-offsets --from-file /tmp/offsets.csv --group TestGroup1 --execute

GROUP                          TOPIC                          PARTITION  NEW-OFFSET     TestGroup1                     topic1                         1          20             TestGroup1                     topic1                         0          10             TestGroup1                     topic1                         3          40             TestGroup1                     topic1                         2          30             TestGroup1                     topic1                         5          60             TestGroup1                     topic1                         4          50             

Expect:

$ kafka-consumer-groups.sh --bootstrap-server localhost:9092 --reset-offsets --from-file /tmp/offsets.csv --group TestGroup1 --execute

GROUP                          TOPIC                          PARTITION  NEW-OFFSET     
TestGroup1                     topic1                         1          20             
TestGroup1                     topic1                         0          10             
TestGroup1                     topic1                         3          40             
TestGroup1                     topic1                         2          30             
TestGroup1                     topic1                         5          60             
TestGroup1                     topic1                         4          50         

Committer Checklist (excluded from commit message)

• Verify design and implementation
• Verify test coverage and CI build status
• Verify documentation (including upgrade notes)

[AndrewJSchofield]

Thanks for the PR. I built and tried out the patch and it looks good to me.

[lianetm]

Thanks for fixing this @sasakitoa! Played with it locally and looks good to me, very nice improvement indeed.

[lianetm]

Hey @sasakitoa, could you please fix the spotbugs failures? you can re-run it with ./gradlew :tools:spotbugsMain to see the details. Thanks!

[sasakitoa]

Thank you for reviewing and advising.
I fixed it and passed SpotBugs test locally.

[lianetm]

Thanks for the fix @sasakitoa! (All builds completed with unrelated failures)