[SOLR-14564] Fix or suppress remaining warnings in solr/core

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 8.6

Environment

It's getting to the point where the overhead of cleaning up individual directories is getting to be a pain. So this will be 2-3 commits of fixes in whatever order I find them when compiling in IntelliJ.

• Assignee: Erick Erickson
• Reporter: Erick Erickson
• Created: 12/Jun/20 12:16
• Updated: 15/Jul/20 15:09
• Resolved: 13/Jun/20 15:06