Bug 9883 - Koha::Plugins::Base should not require koha-conf to load

Test Plan:
1) Run t/db_dependent/Plugins.t
2) Apply patch
3) Re-run t/db_dependent/Plugins.t

Signed-off-by: Magnus Enger <magnus@enger.priv.no>
The tests pass both before and after the patch. I can see no
ill effects on the functionality (tried uploading and
accessing the Kitchen Sink plugin).

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
After installing libmodule-bundled-files-perl from the
debian.koha-community.org I ran through Makefile.PL
updating my conf file successfully. Also all tests
and QA script pass now.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Bug 9883 - Add missing parameter to koha-conf.xml causing Plugins.t to fail

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Bug 9883 - Koha::Plugins::* should not require koha-conf to load - Followup - Load C4::Auth at run time

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Unset KOHA_CONF variable and made sure t/00_load.t passed
Also ran Makefile.PL doing an update on my existing installation
and checked koha-conf.xml:

 <pluginsdir>/home/katrin/koha-dev/var/lib/plugins</pluginsdir>
 <enable_plugins>0</enable_plugins>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Merge branch 'bug_9883' into 3.12-master