CLOUDIFY-2022 fix plugin verification task. dont append celery. it is added by ruote
CLOUDIFY-2022 fix plugin verification task. dont append celery. it is added by ruote

isaac-s/cloudify-manager,konradxyz/cloudify-manager,cloudify-cosmo/cloudify-manager,isaac-s/cloudify-manager,konradxyz/dev_fileserver,cloudify-cosmo/cloudify-manager,codilime/cloudify-manager,konradxyz/cloudify-manager,isaac-s/cloudify-manager,geokala/cloudify-manager,cloudify-cosmo/cloudify-manager,codilime/cloudify-manager,codilime/cloudify-manager,konradxyz/dev_fileserver,geokala/cloudify-manager