Fix already initialized constant warning when `--search-gems` is specified
Fix already initialized constant warning when `--search-gems` is specified

Foodcritic already includes its rules, `rule_files_in_gems` should skip
the foodcritic gem.

Signed-off-by: Joe Nuspl <9a26904f0b2b68e21031422ce456108653f5eec5@nvwls.com>

Foodcritic/foodcritic,acrmp/foodcritic