closes#6462
- monkey-patch validator.extends() since it was dropped by validator @5.0.0
- coerce input to string prior to validation (custom toString func)
- need to handle boolean validation based on column type not isIn()
- use `lodash.tostring` to convert input values to strings
refs #6301, #6399
- new scheduler client will be used by any web app that handles time and calls back to the scheduling API at the right time
- new scheduler client will need to be confidential, rather than public, hence the 'web' type instead of 'ua'
- adds validation to client type that it must have a type of 'ua', 'web', or 'native'
refs #6301
- In the migration folder, commands.js changed to builder.js to resolve conflict with the 'commands' inside data/utils/clients/.
- a new data/schema/ folder has been added to hold all the code related to the database schema
- data/utils/clients have been moved to data/schema/clients
- data/utils/index.js has become data/schema/commands.js
- data/schema.js has been split, the definition of the DB schema stays put, the additional checks have moved to data/schema/checks.js
- data/validation/index.js has become data/schema/versioning.js
- data/fixtures has moved to data/migration/fixtures
- data/default-settings.json has moved to data/schema/default-settings.json
