*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##
Submodule changes track ##beghelli/ojs-stable-2_4##