finally fixed test suite as a whole (guilty: artifact in class variable @@compressor of Backup::Model).
finally fixed test suite as a whole (guilty: artifact in class variable @@compressor of Backup::Model).

bernd/backup,ccoenen/backup,interu/backup,scalp42/backup,rics3n/backup,pawelduda/backup,ccoenen/backup,scalp42/backup,tian-xiaobo/backup,pawelduda/backup,bernd/backup,McStork/backup,hiphapis/backup,otzy007/backup,reedloden/backup,backup/backup,pat/backup,zires/backup,hiphapis/backup,interu/backup,martincik/backup,pollosp/backup,backup/backup,tian-xiaobo/backup,pollosp/backup,skcript/backup,zires/backup,rics3n/backup,otzy007/backup,ccoenen/backup,McStork/backup,zires/backup,john/backup,backup/backup,interu/backup,skcript/backup,skcript/backup,hiphapis/backup,zBMNForks/backup,zBMNForks/backup,otzy007/backup,bukalapak/backup,martincik/backup,tian-xiaobo/backup,reedloden/backup,pollosp/backup,martincik/backup,rics3n/backup,sferik/backup,scalp42/backup,zBMNForks/backup,pawelduda/backup,reedloden/backup,juliancheal/backup,McStork/backup