Merge pull request #282 from sotty/5.6.x

[DROOLS-64] Fix serialization
[BZ-1027221] prevent KnowledgeAgent to keep rebuilding kbase from cached files
Merge pull request #285 from sotty/5.6.x

 [DROOLS-296] rewrite or constraints when necessary
Merge pull request #288 from sotty/5.6.x

[DROOLS-352] JUSTIFIED status is overridden to STATED when TMS is enable...
Merge pull request #292 from sotty/5.6.x

[BZ 1034359] Trait serialization
[DROOLS-376] avoid NPE on JPAKnowledgeService.loadStatefulKnowledgeSession() when Collection is modified
[BZ-1040032] set tuple memory when copying the content of a TupleList
[DROOLS-372] fix jitting of constraint using Serializable
[DROOLS-370] Declarative Agenda control does not support all possible constraints
[DROOLS-378] Do not refire rules on unblock