[rubocop] fix offenses

lib/refrepo/gen/oar-properties.rb

lib/refrepo/gen/puppet/bindg5k.rb

lib/refrepo/gen/puppet/dhcpg5k.rb

lib/refrepo/gen/puppet/kavlanngg5k.rb

lib/refrepo/gen/puppet/lanpowerg5k.rb

lib/refrepo/gen/puppet/refapi-subset.rb

lib/refrepo/gen/reference-api.rb

lib/refrepo/gen/wiki/generators/cpu_parameters.rb

lib/refrepo/gen/wiki/generators/disk_reservation.rb

lib/refrepo/gen/wiki/generators/group_storage.rb

lib/refrepo/gen/wiki/generators/hardware.rb

lib/refrepo/gen/wiki/generators/kwollect_metrics.rb

lib/refrepo/gen/wiki/generators/oar_properties.rb

lib/refrepo/gen/wiki/generators/oarsub_simplifier_aliases.rb

lib/refrepo/gen/wiki/generators/site_hardware.rb

lib/refrepo/gen/wiki/generators/status.rb

lib/refrepo/hash/hash.rb

lib/refrepo/input_loader.rb

lib/refrepo/utils.rb

lib/refrepo/valid/input/duplicates.rb