As discussed in PR #3728, it is better to move the two methods
reduceALQtoGroupTarget() and checkGroupTargetsViolated() from
OptimizeState to the parent class, then we do not have to abuse
OptimizeState in maybeAdjustALQbeforeOptimizeLoop_() just to call
reduceALQtoGroupTarget().
Also fixes a typo (as discussed in PR #3729) in reduceALQtoGrouptTarget()
where the water rate is updated with the gas flow rate instead of the
water flow rate. Should be like this:
water_rate = -potentials[this->parent.water_pos_];
instead of
water_rate = -potentials[this->parent.gas_pos_];
Check group limits in gas lift stage 1 to avoid adding too much ALQ which must
anyway later be removed in stage 2. This should make the optimization
more efficient for small ALQ increment values. Also adds MPI support.
