Add assertion of wsrep_cluster_size at end of percona playbook run.
Add assertion of wsrep_cluster_size at end of percona playbook run.

EricCrosson/ursula,channus/ursula,kennjason/ursula,rongzhus/ursula,dlundquist/ursula,dlundquist/ursula,aldevigi/ursula,masteinhauser/ursula,dlundquist/ursula,persistent-ursula/ursula,blueboxgroup/ursula,twaldrop/ursula,pgraziano/ursula,panxia6679/ursula,MaheshIBM/ursula,fancyhe/ursula,blueboxgroup/ursula,retr0h/ursula,rongzhus/ursula,twaldrop/ursula,knandya/ursula,nirajdp76/ursula,zrs233/ursula,ryshah/ursula,allomov/ursula,wupeiran/ursula,j2sol/ursula,EricCrosson/ursula,twaldrop/ursula,narengan/ursula,wupeiran/ursula,greghaynes/ursula,edtubillara/ursula,lihkin213/ursula,fancyhe/ursula,pgraziano/ursula,masteinhauser/ursula,edtubillara/ursula,j2sol/ursula,channus/ursula,ryshah/ursula,j2sol/ursula,twaldrop/ursula,lihkin213/ursula,retr0h/ursula,andrewrothstein/ursula,lihkin213/ursula,pgraziano/ursula,msambol/ursula,lihkin213/ursula,rongzhus/ursula,fancyhe/ursula,blueboxjesse/ursula,channus/ursula,fancyhe/ursula,greghaynes/ursula,pbannister/ursula,edtubillara/ursula,knandya/ursula,narengan/ursula,andrewrothstein/ursula,knandya/ursula,blueboxjesse/ursula,aldevigi/ursula,blueboxgroup/ursula,wupeiran/ursula,paulczar/ursula,jwaibel/ursula,jwaibel/ursula,davidcusatis/ursula,pgraziano/ursula,nirajdp76/ursula,zrs233/ursula,blueboxjesse/ursula,channus/ursula,nirajdp76/ursula,mjbrewer/ursula,mjbrewer/ursula,allomov/ursula,ddaskal/ursula,edtubillara/ursula,knandya/ursula,sivakom/ursula,masteinhauser/ursula,msambol/ursula,MaheshIBM/ursula,mjbrewer/ursula,andrewrothstein/ursula,ryshah/ursula,panxia6679/ursula,davidcusatis/ursula,masteinhauser/ursula,kennjason/ursula,narengan/ursula,greghaynes/ursula,allomov/ursula,zrs233/ursula,EricCrosson/ursula,persistent-ursula/ursula,MaheshIBM/ursula,ddaskal/ursula,ryshah/ursula,ddaskal/ursula,davidcusatis/ursula,wupeiran/ursula,blueboxjesse/ursula,sivakom/ursula,paulczar/ursula,narengan/ursula,persistent-ursula/ursula,jwaibel/ursula,aldevigi/ursula,rongzhus/ursula,retr0h/ursula,kennjason/ursula,persistent-ursula/ursula,panxia6679/ursula,msambol/ursula,sivakom/ursula,pbannister/ursula,nirajdp76/ursula,ddaskal/ursula,pbannister/ursula,blueboxgroup/ursula,zrs233/ursula,j2sol/ursula,paulczar/ursula,panxia6679/ursula