Optaplanner should find defaultKieSession even if it not defined in kmodule.xml

The following kmodule.xml and solver.xml combination is broken
When no ksession is defined in kmodule.xml and no ksessionName is set in solver.xml optaplanner should find the ksession called "defaultKieSession".

<?xml version="1.0" encoding="UTF-8"?>
<kmodule xmlns="http://www.drools.org/xsd/kmodule">
</kmodule>

<?xml version="1.0" encoding="UTF-8"?>
<!-- This file is copy pasted to another package in the KieContainer test to avoid false positive tests -->
<solver>
<scanAnnotatedClasses>
<packageInclude>testdata.kjar</packageInclude>
</scanAnnotatedClasses>

<!-- Score configuration -->
<scoreDirectorFactory>
<scoreDefinitionType>SIMPLE</scoreDefinitionType>
</scoreDirectorFactory>
</solver>