Improve crashdump_viewer_SUITE:start_stop test case
Improve crashdump_viewer_SUITE:start_stop test case

Instead of setting a timer and expecting all processes to be
terminated, set a monitor and wait for them to terminate.

release-project/otp,emacsmirror/erlang,vladdu/otp,sdebnath/otp,lhslll/otp,vinoski/otp,awetzel/otp,RichMorin/otp,RGafiyatullin/otp,gjaldon/otp,klarna/otp,goertzenator/otp,RaimoNiskanen/otp,dumbbell/otp,RaimoNiskanen/otp,jj1bdx/otp,kvakvs/otp,riverrun/otp,falkevik/otp,theom/otp,weisslj/otp,saleyn/otp,lemenkov/otp,GinjaNinja32/otp,g-andrade/otp,vladdu/otp,tuncer/otp,basho/otp,bernardd/otp,sdebnath/otp,riverrun/otp,msantos/otp,cnbin/otp,lightcyphers/otp,massemanet/otp,RJ/otp,jemsbhai/otp,weisslj/otp,neeraj9/otp,rlipscombe/otp,ahmedshafeeq/otp,electricimp/otp,sitexa/otp,lrascao/otp,haguenau/otp,msantos/otp,emile/otp,marquisthunder/otp,lucafavatella/otp,saleyn/otp,getong/otp,release-project/otp,falkevik/otp,theom/otp,vladdu/otp,bsmr-erlang/otp,palas/otp,bsmr-erlang/otp,Teino1978-Corp/erlang-otp,jamesruan/otp,erlang/otp,schlagert/otp,lantti/otp,RGafiyatullin/otp,beni55/otp,dumbbell/otp,RichMorin/otp,ader1990/otp,sammoth-wazoku/otp,derek121/otp,matwey/otp,kvakvs/otp,RoadRunnr/otp,bjorng/otp,vinoski/otp,platinumthinker/otp,ferd/otp,marquisthunder/otp,awetzel/otp,yangchengjian/otp,lrascao/otp,dumbbell/otp,goertzenator/otp,bjorng/otp,RaimoNiskanen/otp,hairyhum/otp,uabboli/otp,lantti/otp,emile/otp,legoscia/otp,bernardd/otp,marquisthunder/otp,haguenau/otp,aboroska/otp,vic/otp,uabboli/otp,erlang/otp,lrascao/otp,vic/otp,dgud/otp,jj1bdx/otp,potatosalad/otp,NOMORECOFFEE/otp,vinoski/otp,mikpe/otp,matwey/otp,msantos/otp,cnbin/otp,g-andrade/otp,lhslll/otp,falkevik/otp,legoscia/otp,bsmr-erlang/otp,beni55/otp,paladim/otp,sammoth-wazoku/otp,johanclaesson/otp,bernardd/otp,theom/otp,ader1990/otp,lrascao/otp,haguenau/otp,awetzel/otp,paulcager/otp,entropiae/otp,dumbbell/otp,rlipscombe/otp,palas/otp,awetzel/otp,vinoski/otp,g-andrade/otp,lucafavatella/otp,RGafiyatullin/otp,bsmr-erlang/otp,bjorng/otp,kvakvs/otp,g-andrade/otp,theom/otp,dumbbell/otp,jinshana/otp,erlang/otp,vladdu/otp,isvilen/otp,GinjaNinja32/otp,uabboli/otp,riverrun/otp,electricimp/otp,fenollp/otp,c-rack/otp,uabboli/otp,haguenau/otp,vic/otp,isvilen/otp,entropiae/otp,lemenkov/otp,schlagert/otp,rlipscombe/otp,emile/otp,krishnakumar4a4/otp,vinoski/otp,mikpe/otp,aboroska/otp,VincentHHL/otp,haguenau/otp,electricimp/otp,tuncer/otp,jj1bdx/otp,potatosalad/otp,paladim/otp,dgud/otp,benoitc/otp-1,emile/otp,Teino1978-Corp/erlang-otp,krishnakumar4a4/otp,vic/otp,RGafiyatullin/otp,bernardd/otp,legoscia/otp,lucafavatella/otp,fenollp/otp,vinoski/otp,stolen/otp,release-project/otp,RichMorin/otp,massemanet/otp,yangchengjian/otp,emacsmirror/erlang,aboroska/otp,GinjaNinja32/otp,kvakvs/otp,falkevik/otp,paulcager/otp,VincentHHL/otp,sdebnath/otp,gjaldon/otp,cnbin/otp,sdebnath/otp,lightcyphers/otp,RaimoNiskanen/otp,RGafiyatullin/otp,hairyhum/otp,stolen/otp,ader1990/otp,isvilen/otp,Teino1978-Corp/erlang-otp,jinshana/otp,goertzenator/otp,krishnakumar4a4/otp,falkevik/otp,vinoski/otp,krishnakumar4a4/otp,enikki/otp,theom/otp,schlagert/otp,Teino1978-Corp/otp,cobusc/otp,bjorng/otp,g-andrade/otp,RJ/otp,RichMorin/otp,emile/otp,Teino1978-Corp/otp,lemenkov/otp,theom/otp,bsmr-erlang/otp,palas/otp,ahmedshafeeq/otp,goertzenator/otp,VincentHHL/otp,bugs-erlang-org/otp,mikpe/otp,kvakvs/otp,c-rack/otp,basho/otp,cobusc/otp,sammoth-wazoku/otp,fenollp/otp,mujiatong/otp,neeraj9/otp,ferd/otp,klarna/otp,mikpe/otp,jamesruan/otp,emile/otp,palas/otp,marquisthunder/otp,sammoth-wazoku/otp,RichMorin/otp,aboroska/otp,release-project/otp,msantos/otp,palas/otp,massemanet/otp,ahmedshafeeq/otp,platinumthinker/otp,fenollp/otp,potatosalad/otp,NOMORECOFFEE/otp,lantti/otp,basho/otp,klarna/otp,erlang/otp,bugs-erlang-org/otp,goertzenator/otp,gjaldon/otp,tuncer/otp,matwey/otp,lucafavatella/otp,massemanet/otp,getong/otp,lemenkov/otp,lightcyphers/otp,riverrun/otp,enikki/otp,jamesruan/otp,RGafiyatullin/otp,aboroska/otp,vinoski/otp,lianghaivv/otp,kvakvs/otp,neeraj9/otp,entropiae/otp,lhslll/otp,lantti/otp,klarna/otp,mujiatong/otp,sdebnath/otp,ader1990/otp,platinumthinker/otp,release-project/otp,hairyhum/otp,tuncer/otp,massemanet/otp,bernardd/otp,Teino1978-Corp/erlang-otp,benoitc/otp-1,VincentHHL/otp,bernardd/otp,mujiatong/otp,vic/otp,getong/otp,potatosalad/otp,haguenau/otp,lightcyphers/otp,theom/otp,neeraj9/otp,bsmr-erlang/otp,basho/otp,jj1bdx/otp,ferd/otp,RaimoNiskanen/otp,aboroska/otp,bernardd/otp,saleyn/otp,c-rack/otp,emile/otp,fenollp/otp,bsmr-erlang/otp,mujiatong/otp,potatosalad/otp,lrascao/otp,saleyn/otp,jamesruan/otp,awetzel/otp,gjaldon/otp,Teino1978-Corp/otp,psyeugenic/otp,jemsbhai/otp,enikki/otp,release-project/otp,derek121/otp,enikki/otp,paulcager/otp,beni55/otp,lianghaivv/otp,legoscia/otp,basho/otp,entropiae/otp,derek121/otp,lantti/otp,lrascao/otp,psyeugenic/otp,lhslll/otp,weisslj/otp,VincentHHL/otp,cnbin/otp,lemenkov/otp,cobusc/otp,RaimoNiskanen/otp,NOMORECOFFEE/otp,enikki/otp,release-project/otp,msantos/otp,platinumthinker/otp,vladdu/otp,electricimp/otp,RJ/otp,dumbbell/otp,lemenkov/otp,enikki/otp,psyeugenic/otp,lrascao/otp,rlipscombe/otp,erlang/otp,riverrun/otp,sdebnath/otp,weisslj/otp,psyeugenic/otp,paulcager/otp,gjaldon/otp,ben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