Refactoring test resource files to remove 1 TODO

[Amemeda]

• Removing "# TODO: these test resources should be moved into the correct package for the module" from line 59 of of check-module-packaging-conventions.sh
• moved groups of test files into new org/apache/accumulo/.. packages to match the module
• refactor updated file paths references across java files.

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original file paths:
core/src/test/resources/accumulo.jceks
core/src/test/resources/empty.jceks
core/src/test/resources/site-cfg.jceks
core/src/test/resources/accumulo2.properties
core/src/test/resources/passwords.jceks
minicluster/src/test/resources/FooFilter.jar
server/tserver/src/test/resources/walog-from-15.walog
server/tserver/src/test/resources/walog-from-16.walog
server/tserver/src/test/resources/walog-from-14/550e8400-e29b-41d4-a716-446655440000
server/tserver/src/test/resources/walog-from-20.walog
test/src/main/resources/v2_import_test/README.md
test/src/main/resources/v2_import_test/data/A0000008.rf
test/src/main/resources/v2_import_test/data/A0000009.rf
test/src/main/resources/v2_import_test/data/A000000a.rf
test/src/main/resources/v2_import_test/data/A000000b.rf
test/src/main/resources/v2_import_test/data/distcp.txt
test/src/main/resources/v2_import_test/data/exportMetadata.zip

[Amemeda]

This pr resovles 1 TODO from #2699