Business-central cannot be deployed to WebSphere application server because of UnsatisfiedResolutionException : ksession1

Description of problem:
After deploying the business-central to WAS, the "start" operation failed, because of javax.enterprise.inject.UnsatisfiedResolutionException: Api type [org.kie.api.runtime.KieSession] is not found with the qualifiers
Qualifiers: [@org.kie.api.cdi.KSession(name=, value=ksession1)]
for injection into
Field Injection Point, field : org.kie.api.runtime.KieSession org.drools.workbench.common.services.rest.JobRequestApprovalService.ksession

see the complete stacktrace in the attachment.

Version-Release number of selected component (if applicable):
6.0.1.CR1

Additional info:
Even modifying the drools-wb-rest-defaultapprover.jar/META-INF/kmodule.xml and making the ksession1 default did not help.