Unable to set indefinite max wait time on DBCPConnectionPool

The DBCPConnectionPool controller service accepts a "Max Wait Time" that configures 

The maximum amount of time that the pool will wait (when there are no available connections) for a connection to be returned before failing, or -1 to wait indefinitely.

This value must validate as a time period. There is no valid way to set -1 with the current validator.

The validator in use is StandardValidators.TIME_PERIOD_VALIDATOR. The TIME_PERIOD_VALIDATOR uses a regex built in FormatUtils that must have a time unit:

public static final String TIME_DURATION_REGEX = "(\\d+)\\s*(" + VALID_TIME_UNITS + ")";

The regex does not allow for an value such as -1 or -1 secs, etc.

The obvious workaround is to set that very high.