Refactor _parse_zone_group_state for deduplication
Refactor _parse_zone_group_state for deduplication

Logic shared between the loop parsing member elements and the inner loop
parsing nested satellite elements pulled out into an additional private method.

KennethNielsen/SoCo,bwhaley/SoCo,dundeemt/SoCo,xxdede/SoCo,TrondKjeldas/SoCo,dsully/SoCo,DPH/SoCo,fgend31/SoCo,KennethNielsen/SoCo,intfrr/SoCo,xxdede/SoCo,TrondKjeldas/SoCo,fxstein/SoCo,DPH/SoCo,petteraas/SoCo,meska/SoCo,dajobe/SoCo,dsully/SoCo,lawrenceakka/SoCo,dundeemt/SoCo,intfrr/SoCo,jlmcgehee21/SoCo,bwhaley/SoCo,flavio/SoCo,fgend31/SoCo,flavio/SoCo,bwhaley/SoCo,petteraas/SoCo,xxdede/SoCo,petteraas/SoCo,SoCo/SoCo,lawrenceakka/SoCo,fxstein/SoCo,simonalpha/SoCo,simonalpha/SoCo,TrondKjeldas/SoCo,dajobe/SoCo,SoCo/SoCo,meska/SoCo,jlmcgehee21/SoCo