Fix #1180: also look into outgoing header while propagating

[gabriel-farache]

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Fixes #1180

Fixes apache/incubator-kie-issues#1968

[gabriel-farache]

@fjtirado @ricardozanini I took the liberty to add some debug logs, I can set them to Trace or even remove them if you don't feel comfortable by having those

[fjtirado]

I think some traces should be removed beyond the one reported by codeql
Great work @gabriel-farache!!!

[gabriel-farache]

I think some traces should be removed beyond the one reported by codeql Great work @gabriel-farache!!!

Yeah...I am only logging the header keys now and never a single header value

[gmunozfe]

Looks good to me, excellent work @gabriel-farache !

[gabriel-farache]

FYI this will also needs to be backported to LTS