Some of the places in the code where MD5 is used:

./migrate/20140912113254_add_password_hash_to_operatingsystem.rb
./migrate/20150428110835_change_os_default_password_hash.rb
./app/controllers/api/v1/operatingsystems_controller.rb
./app/controllers/api/v2/operatingsystems_controller.rb
./app/helpers/unattended_helper.rb
./app/helpers/application_helper.rb
./app/models/setting/email.rb
./app/services/password_crypt.rb
./app/views/unattended/provisioning_templates/snippet/_bmc_nic_setup.erb