moved WithFilters and GlobalLike into composition
US951 made a mock of VehicleAndKeeperLookupWebService in TestModule
US951 rename to VehicleAndKeeperLookupWebServiceConstants
US951: moved vrmRetentionEligibilityWebService stub into TestModule
US951: Renamed to VrmRetentionEligibilityWebServiceConstants, deleted unused method (now stubbed in TestModule)
US951: made mock of vrmRetentionRetainWebServiceImpl in TestModule
US951: renamed file to VrmRetentionRetainWebServiceConstants, tidy up
US951: commonised constraints NumberOnly, DropDown and Required
moved the controllers up a package level
Merge branch 'develop' of gitlab.skyscape.preview-dvla.co.uk:dvla/vrm-retention-online into develop

Conflicts:
	app/mappings/common/DocumentReferenceNumber.scala
US951: commonised DocumentReferenceNumber
US951: commonised Milage. Postcode is half-done as a form exists id
US951 commonised VehicleRegistrationNumber
moved dropdown to mirroe vehicles-online
Fix merge
US951: commonised baseTemplate and emptyTemplate, added TODOs
US951: removed unused
Refactor: csrf helper should use the implicit Config so that we can inject values
refactored Confirm mapping as per vehicles-online and added manual address hints
Merge branch 'develop' of gitlab.skyscape.preview-dvla.co.uk:dvla/vrm-retention-online into develop