Pulp services failing with ImportError: No module named gnupg on Red Hat Satellite 6.

Issue

• Pulp failing with ImportError: No module named gnupg on Red Hat Satellite 6.
• pulp_resource_manager.service and pulp_streamer.service failing with below error:

● pulp_resource_manager.service - Pulp Resource Manager
   Loaded: loaded (/usr/lib/systemd/system/pulp_resource_manager.service; enabled; vendor preset: disabled)
   Active: inactive (dead) since Fri 2019-05-17 08:19:03 CDT; 24min ago
  Process: 27030 ExecStart=/usr/bin/celery worker -A pulp.server.async.app -n resource_manager@%%h -Q resource_manager -c 1 --events --umask 18 --pidfile=/var/run/pulp/resource_manager.pid (code=exited, status=0
/SUCCESS)
 Main PID: 27030 (code=exited, status=0/SUCCESS)

May 17 08:19:03 satellite.example.com pulp[27030]: celery.worker:ERROR: (27030-79552)     loading.load_plugins_from_entry_point(*entry_point)
May 17 08:19:03 satellite.example.com pulp[27030]: celery.worker:ERROR: (27030-79552)   File "/usr/lib/python2.7/site-packages/pulp/plugins/loader/loading.py", line 60, in load_plugins_from_entry_point
May 17 08:19:03 satellite.example.com pulp[27030]: celery.worker:ERROR: (27030-79552)     cls, cfg = entry_point.load()()
May 17 08:19:03 satellite.example.com pulp[27030]: celery.worker:ERROR: (27030-79552)   File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2260, in load
May 17 08:19:03 satellite.example.com pulp[27030]: celery.worker:ERROR: (27030-79552)     entry = __import__(self.module_name, globals(),globals(), ['__name__'])
May 17 08:19:03 satellite.example.com pulp[27030]: celery.worker:ERROR: (27030-79552)   File "/usr/lib/python2.7/site-packages/pulp_ostree/plugins/importers/web.py", line 9, in <module>
May 17 08:19:03 satellite.example.com pulp[27030]: celery.worker:ERROR: (27030-79552)     from pulp_ostree.plugins.importers.steps import Main
May 17 08:19:03 satellite.example.com pulp[27030]: celery.worker:ERROR: (27030-79552)   File "/usr/lib/python2.7/site-packages/pulp_ostree/plugins/importers/steps.py", line 8, in <module>
May 17 08:19:03 satellite.example.com pulp[27030]: celery.worker:ERROR: (27030-79552)     from gnupg import GPG
May 17 08:19:03 satellite.example.com pulp[27030]: celery.worker:ERROR: (27030-79552) ImportError: No module named gnupg
/usr/sbin/service-wait pulp_streamer status
● pulp_streamer.service - The Pulp lazy content loading streamer
   Loaded: loaded (/usr/lib/systemd/system/pulp_streamer.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Fri 2019-05-17 08:19:03 CDT; 24min ago
  Process: 27048 ExecStart=/usr/bin/pulp_streamer --nodaemon --syslog --prefix=pulp_streamer --pidfile= --python /usr/share/pulp/wsgi/streamer.tac (code=exited, status=1/FAILURE)
 Main PID: 27048 (code=exited, status=1/FAILURE)

May 17 08:19:03 satellite.example.com pulp_streamer[27048]: entry = __import__(self.module_name, globals(),globals(), ['__name__'])
May 17 08:19:03 satellite.example.com pulp_streamer[27048]: File "/usr/lib/python2.7/site-packages/pulp_ostree/plugins/importers/web.py", line 9, in <module>
May 17 08:19:03 satellite.example.com pulp_streamer[27048]: from pulp_ostree.plugins.importers.steps import Main
May 17 08:19:03 satellite.example.com pulp_streamer[27048]: File "/usr/lib/python2.7/site-packages/pulp_ostree/plugins/importers/steps.py", line 8, in <module>
May 17 08:19:03 satellite.example.com pulp_streamer[27048]: from gnupg import GPG
May 17 08:19:03 satellite.example.com pulp_streamer[27048]: exceptions.ImportError: No module named gnupg
May 17 08:19:03 satellite.example.com pulp_streamer[27048]: Failed to load application: No module named gnupg
May 17 08:19:03 satellite.example.com systemd[1]: pulp_streamer.service: main process exited, code=exited, status=1/FAILURE
May 17 08:19:03 satellite.example.com systemd[1]: Unit pulp_streamer.service entered failed state.
May 17 08:19:03 satellite.example.com systemd[1]: pulp_streamer.service failed.