*8895* PKP PLN Plugin commit.
Merge pull request #306 from FourthAndVine/ojs-stable-2_4-8895

*8895* PKP PLN Plugin commit.
*8843* Submodule update ##MichaelThessel/8843_test_fixes_stable##
Merge pull request #308 from MichaelThessel/8843_test_fixes_stable

*8843* Submodule update ##MichaelThessel/8843_test_fixes_stable##
Release prep
Translated workflow graphics.
*8901* changes to es_ES locale

merged manually from https://github.com/pkp/ojs/pull/272/commits
*8901* changes to es_ES locale

merged manually from https://github.com/pkp/ojs/pull/274
*8901* translations from translation install
*8901* translations from translation install

includes changes to fr_CA submitted previously, as well as PLN changes
Fixed create journal test, use value instead of localized text
Fixed PLN plugin schema version definition
Submodule changes track
Merge remote-tracking branch 'upstream/ojs-stable-2_4' into ojs-stable-2_4