Move contents of kie-eap-modules repository directly into droolsjbpm-integration

The KIE EAP integration now resides inside its own repository https://github.com/jboss-integration/kie-eap-modules. This is for some historical reasons which no longer seem to apply (e.g. we no longer build skinny WARs, we just bundle core engine jars as JBoss modules).

We should move the content directly into droolsjbpm-integration repository, under kie-eap-integration sub-directory. This would decrease the maintenance effort connected with having large number of source repositories.