The configuration of the `MonopoleLooperKiller` missed being updated
in the last update of the configuration syntax of `G4UserActions`.
This means that monopole simulation jobs fail in 21.0.37.
This commit updates the syntax such that the jobs should now succeed.
Should fix ATLASSIM-3440.

A number of different ways of configuring UserAction Tools were tried.
This merge request attempts to migrate all syntax to use simFlags.OptionalUserActionList

In the cases where both V1 and V2 implmentations are present, the V1
implementations can just be dropped. See ATLASSIM-3023

2016-05-07 Andrea Di Simone <andrea.di.simone@cern.ch>
	* migrated ScoringPlane and FluxRecorder to hive. both will only run with 1 thread
	* tagging G4UserActions-00-01-19
2016-04-07  Andrea Di Simone
	* src/HitWrapper.cxx: fixed collection names
	* tagging  G4UserActions-00-01-18

2016-04-06  John Chapman  <John.Chapman@cern.ch>

	* src/CosmicPerigeeAction.cxx (CosmicPerigeeAction::BeginOfEvent)
	(G4UA::CosmicPerigeeAction::beginOfEvent): set the name of the
	* Tagging: G4UserActions-00-01-17
2016-01-14 Steve Farrell <Steven.Farrell@cern.ch>
	* V2 migration of the LengthIntegrator. Usage of the THistSvc and
	  histograms is protected via mutex locks for thread-safety. This
	  implementation is not intended to be performant, however.
	* Tagging: G4UserActions-00-01-16

2016-01-11 Andrea Di Simone
	* removed some verbosity
...
(Long ChangeLog diff - truncated)

2016-01-22  John Chapman  <John.Chapman@cern.ch>
	* src/CosmicPerigeeAction.cxx (BeginOfEvent): set the name of the
	TrackRecordCollection object properly. ATLASSIM-2517
	* tagging G4UserActions-00-01-05-02

2015-12-18  John Chapman  <John.Chapman@cern.ch>

	* cmt/requirements - drop use statement for
	G4DetectorEnvelopes. Add use statement for CxxUtils. General
	tidying. ATLASSIM-2481
	* src/CosmicPerigeeAction.cxx, G4UserActions/CosmicPerigeeAction.h
	- switch to using a WriteHandle for the TrackRecordCollection. Set
	default values for m_idR and m_idZ, then drop
	EnvelopeGeometryManager. ATLASSIM-2481
	* src/FastIDKiller.cxx, G4UserActions/FastIDKiller.h - set default
	values for m_idR and m_idZ, then drop
	EnvelopeGeometryManager. ATLASSIM-2481
	* tagging G4UserActions-00-01-05-01

2015-09-15  John Chapman  <John.Chapman@cern.ch>
...
(Long ChangeLog diff - truncated)