AVRO-3845: avro-tools: Add log entry when an external schema is used

[rulle-io]

What is the purpose of the change

When avro-tools fromjson parameter --schema-file or --schema is used, it is unclear whether the tool actually picked up the provided schema.

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

Also a couple of code style warnings are fixed.

[clesaec]

Nice small change.
Please, could you create a JIRA (as explain on how to contribute), then i'll approve the change and then ping a commiter about it.

[rulle-io]

Thanks @clesaec. I have sent a request to get a Jira user (to create a ticket). But no response since a few weeks back.

[martin-g]

@rulle-io

ASF Self-serve Portal - Friday, July 14, 2023 8:55:26 AM GMT+3

New Jira account created: rulle-io

Hi there,
As approved by [email protected], a new Jira user account, rulle-io, has been created.

They provided the public name: Ruslan Altynnikov
and the reason: Submit a PR

An email has been sent to the email address provided and this new user will
need to reset their password before logging in for the first time.

[rulle-io]

Done: https://issues.apache.org/jira/browse/AVRO-3845 .

[rulle-io]

Tested manully:

--schema-file

avro-tools fromjson --schema-file example.avro example.json
...
23/08/26 14:46:15 INFO tool.DataFileReadTool: Reading schema from file 'example.avro'

--schema

avro-tools fromjson 
  --schema {"namespace":"example.avro","type":"record","name":"User","fields":[{"name":"name","type":"string"},{"name":"favorite_number","type":"int"},{"name":"favorite_color","type":"string"}]} 
  example.avro
...
23/08/26 15:04:33 INFO tool.DataFileReadTool: Reading schema from string '{namespace:example.avro,type:record,name:User,fields:[{name:name,type:string},{name:favorite_number,type:int},{name:favorite_color,type:string}]}'

[clesaec]

👍