Description of problem: 
dnf system-upgrade plugin is not recognized by dnf after installation. NOT the LANG!=en* problem, LANG=en_US.UTF-8 is set

# dnf install dnf-plugin-system-upgrade

Last metadata expiration check performed 0:10:14 ago on Thu Nov 5 21:26:38 2015.
Package dnf-plugin-system-upgrade-0.7.0-1.fc22.noarch is already installed, skipping.
Dependencies resolved.
Nothing to do.
Complete!

But it does not seem to be available.

# dnf system-upgrade download –releasever 23

No such command: system-upgrade. Please use /usr/bin/dnf –help
It could be a DNF plugin command, try: “dnf install ‘dnf-command(system-upgrade)'”

The alternative install appears to works as well.

# dnf install ‘dnf-command(system-upgrade)’

Last metadata expiration check performed 0:06:35 ago on Thu Nov 5 21:50:16 2015.
Package dnf-plugin-system-upgrade-0.7.0-1.fc22.noarch is already installed, skipping.
Dependencies resolved.
Nothing to do.
Complete!

But after that the down load step still fails. I have successfully un-installed the plug in and re-installed but with the same results. It acts like the plugin is not detected.


Version-Release number of selected component (if applicable):
dnf-plugin-system-upgrade-0.7.0-1.fc22.noarch
python2-dnf-plugin-system-upgrade-0.7.0-1.fc22.noarch

# uname -a
Linux poirot.net 4.2.5-201.fc22.x86_64 #1 SMP Wed Oct 28 20:00:23 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux



How reproducible:
On a single system this occurs every time 

Steps to Reproduce:
(see above)

Actual results:
The following messsage is returned -

No such command: system-upgrade. Please use /usr/bin/dnf –help
It could be a DNF plugin command, try: “dnf install ‘dnf-command(system-upgrade)'”


Expected results:
Download step should proceed to download the ~4000 update items.

Additional info:
'dnf update' was run just before the attempt to upgrade (several times).

This system has been updated several time from ~F16, lately using fedup, with no issues. 

# locale
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=en_US.UTF-8