Data Import: Add support for tokens in field mapping profiles

Allow the mapping of variable tokens in field mapping profiles

Sample tokens:

• Today's date (in tenant's localized date format) ###TODAY### (or some other syntax)
• Current time (in tenant's localized time and format) ###TIME### or ###CURRENT_TIME###
• User ID ###USER_ID###
• Import job profile name ###JOB_PROFILE_NAME###

Use cases

• To record details about an import as a MARC modification
  • e.g. add 950 // $a"Profile used: ###JOB_PROFILE_NAME### ###TODAY### ###CURRENT_TIME### ###USER_ID###" $5NcD
  • 950 //$a Profile used: Import Films on Demand 3/31/21 11:19 AM abreaux $5 NcD

TBD

• Exactly which tokens
• Syntax:
  • tokens inside quotation marks or not?
  • existing ### convention or something else?
• Additional use cases