limit log message on rest client exception

[Integer93]

Logging the whole avro-schema could lead to very large log messages. In our case we generated many 16 KB logs.

I would propose to not log the whole schema to avoid that risk.

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[ollio]

This should fix #2936 but it would be nice to add the schema name and ID to the error message