[2.8.x] NEXUS-6492 Mapping mismatch logspam

And related log messages fixed.

Based on JD's proposal, but improved to provide consistent logging about request, and covered PUT HTTP method too.

Issue
https://issues.sonatype.org/browse/NEXUS-6492

CI
https://bamboo.zion.sonatype.com/browse/NX-OSSF31