drools-camel-legacy5: (DROOLS-267) add extra test around passing camel headers through drools endpoint
(cherry picked from commit f938b6c61e5692ede4636f2a3a3cf5d961f6d3d6)
kie-camel: (DROOLS-267) add extra test around passing camel headers through drools endpoint
(cherry picked from commit 86e61dc187518b46773de745c6d35227f9dff542)