Revert "WFLY-3180 OOMs are still possible when using clustered web sessions/SFSBs w/passivation"

This reverts commit 5eb63da59ef7cdf14d678dcba5c75dffc0463875.
Revert "WFLY-3175 Create non-clustered implementations of org.wildfly.clustering.api services"

This reverts commit f1c979a23e6f7616b4cb2f3e664827cf81883198.
Merge pull request #6161 from n1hility/master

Revert Clustering Changes That Introduce EJB-> ISPAN deps