use different approach to fixing /dev/shm issue
use different approach to fixing /dev/shm issue

based on on reading details in travis-core/issues/187
Hero1378/bucky,CollabNet/puppet-bucky,CollabNet/puppet-bucky,ewdurbin/bucky,dimrozakis/bucky,trbs/bucky,JoseKilo/bucky,jsiembida/bucky3,trbs/bucky,Hero1378/bucky,CollabNet/puppet-bucky,JoseKilo/bucky,dimrozakis/bucky,ewdurbin/bucky,CollabNet/puppet-bucky