Pulp

Description of problem:
Warnings in the log when starting/restarting the celery services

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. systemctl restart pulp_workers
2.
3.

Actual results:

Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: /usr/lib/python2.7/site-packages/celery/apps/worker.py:161: CDeprecationWarning:
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: Starting from version 3.2 Celery will refuse to accept pickle by default.
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING:
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: The pickle serializer is a security concern as it may give attackers
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: the ability to execute any command. It's important to secure
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: your broker from unauthorized access when using pickle, so we think
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: that enabling pickle should require a deliberate action and not be
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: the default choice.
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING:
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: If you depend on pickle then you should set a setting to disable this
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: warning and to be sure that everything will continue working
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: when you upgrade to Celery 3.2::
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING:
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: CELERY_ACCEPT_CONTENT = ['pickle', 'json', 'msgpack', 'yaml']
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING:
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: You must only enable the serializers that you will actually use.
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING:
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING:
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING: warnings.warn(CDeprecationWarning(W_PICKLE_DEPRECATED))
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com pulp[28633]: py.warnings:WARNING:
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com celery[28633]: -------------- resource_manager@cloud-qe-15.idmqe.lab.eng.bos.redhat.com v3.1.11 (Cipater)
Oct 09 10:54:43 cloud-qe-15.idmqe.lab.eng.bos.redhat.com celery[28633]: ---- ** -----
Expected results:

Additional info:

+ This bug was cloned from Bugzilla Bug #1151224 +