CLOUDIFY-2049 print celery log file if process doesn't start.
CLOUDIFY-2049 print celery log file if process doesn't start.

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