LP#1677661 Hold Targeter V2 Repairs & Improvements

LP#1677661 Hold Targeter V2 Repairs & Improvements

* Make the batch targeter more resilient to a single-hold failure.

* Additional batch targeter info logging.

* Set OSRF_LOG_CLIENT in hold_targeter_v2.pl for log tracing

* Removes the confusingly name --target-all option

* Adds a new --next-check-interval option for specifying when the
  targeter will next affect the currently processed holds, which may be
  different that now + retarget-interval in cases where the targeter is
  not constantly running.

* Replaces the --skip-viable option with a new --soft-retarget-interval
  option, allowing for time-based soft-targeting.

* Soft-targeting now updates hold_copy_maps for all affected holds, not
  just those requiring a full retarget.

Signed-off-by: Bill Erickson <berickxx@gmail.com>