attestationDaysBeforeToRemind is not a default metadata attribute for attestation

When attestation is configured for a folder/group, the attestation attribute is assigned with a set of metadata attributes included based on user input. AttestationDaysBeforeToRemind is not included, nor is it readily apparent that it is set.

Possible Steps to remediate:
-Add attestationDaysBeforeToRemind to the set of default metadata for attestations
-Add a configurable global default value that is set in grouper.properies and default it to 14 days to coincide with the "less than 2 weeks" note in "Groups that need attestation"
-Update "Groups that need attestation" to factor in the global default when determining what to list.
-Add "Days before reminders are sent" field to "Edit group attestation" that would take user input for the attestationDaysBeforeToRemind
-Add "Days before reminders" column to Attestation Settings -> Folders and Groups with Settings to show the attestationDaysBeforeToRemind value for that object.

-Add "Days before reminders" row to Group Attestation - View attestation settings to display attestationDaysBeforeToRemind.

-Update "Attention: this group's memberships need to be attested soon." to include the number of days before attestation is required".