migrate FeatureList tests from test-data-relocate-me to data_dir

There are a lot of things that have symlinks pointing to
`test-data-relocate-me` which in turn points to
`$GENOME_TEST_INPUTS/legacy-repo-data`.  This is the first batch which just
covers the symlinks under Genome/FeatureList.

When moving the data from `$GENOME_TEST_INPUTS/legacy-repo-data` I symlinked
the ones under `$GENOME_TEST_INPUTS/legacy-repo-data` back to the ones in the
data_dir because I consider the `test-data-relocate-me` to be the inferior.