Move the utility methods for creating symlinks & clearing directories from the PublishStep to the pulp/plugins/util/misc module
Adds tcp_socket shutdown to pulp-celery SELinux modle
Merge branch 'move-plugin-utils-out-of-publish-plugin' into 2.5-dev
Merge pull request #1233 from bmbouter/1149365

1149365 - Adds tcp_socket shutdown to pulp-celery SELinux module
Merge branch '2.5-testing' into 2.5-dev