Backup/restore Composer environment variables
Backup/restore Composer environment variables

The tests could fail if an environment variable replaces an expected
value.

guillaumelecerf/composer,mauricionr/composer,oligriffiths/composer,phansys/composer,kidaa/composer,johnstevenson/composer,jreinke/composer,olvlvl/composer,marcuschia/composer,staabm/composer,joshdifabio/composer,iamluc/composer,javihgil/composer,pierredup/composer,andrerom/composer,Soullivaneuh/composer,kuczek/composer,kocsismate/composer,milleruk/composer,vdm-io/composer,cesarmarinhorj/composer,naderman/composer,zhaoyan158567/composer,remicollet/composer,hirak/composer,thetaxman/composer,webberwu/composer,sroze/composer,mikicaivosevic/composer,SpacePossum/composer,barkinet/composer,myPublicGit/composer,nevvermind/composer,ammmze/composer,balbuf/composer,Risyandi/composer,AndBicScadMedia/composer,Danack/composer,stefangr/composer,fabpot/composer,Netmisa/composer,stof/composer,samdark/composer,Jericho25/composer,legoktm/composer,mrmark/composer,zgj12306/composer,dzuelke/composer,supriyantomaftuh/composer,oxygen-cms/composer,00F100/composer,nater1067/composer,JBleijenberg/composer,andrewnicols/composer,yched/composer,localheinz/composer,PatidarWeb/composer,JeckoHeroOrg/composer,ryanaslett/composer,nicolas-grekas/composer,universalsoftware/composer,jmleroux/composer,melvis01/composer,composer/composer,mothership-ec/composer,ncusoho/composer,flaupretre/composer,MoT3rror/composer,Seldaek/composer,fabiang/composer,dymissy/composer,davidolrik/composer,bd808/composer,rednut/composer,floverdevel/composer,brighten01/composer,mickaelandrieu/composer,erasys/composer,fh/composer,Teino1978-Corp/Teino1978-Corp-composer,gencer/composer,till/composer,theiven70/composer,druid628/composer,curry684/composer,Flyingmana/composer,1234-/composer,alcohol/composer,cgvarela/composer,GodLesZ/composer,gsdevme/composer,Nicofuma/composer,Zagorakiss/composer,szeber/composer,jtanjung/composer,slbmeh/composer,blacksun/composer,yaman-jain/composer,yinhe007/composer,DiceHoldingsInc/composer