Added a wrapper method `leadRepository->getFieldValues()` to call from `getExtendedFieldValues()` to allow e.g. Contact Tracking to work from outgoing email links.

[indorock]

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//: # This Pull Request (Place an 'X' for each):

Risk Level	No	Low	High
Alters Lead Data?	X
Schema Change?	X
Adds A Query or Modifies Existing Query?		X
Adds or Modifies Existing Auto-Enhancer?	X
Modifies Ingestion Process?	X
Modifies sendContact Data?	X

Description:

Added a wrapper method leadRepository->getFieldValues() to call from getExtendedFieldValues() to allow e.g. Contact Tracking to work from outgoing email links.