Fix EZP-20890: Headers overriden by LegacyKernelController
Fix EZP-21064: Added module_result in a LegacyResponse call
The module_result can be used after the legacy controller.
Add integration test for EZP-21057

"contentService: Unable to delete a content with an empty file attribute"
Fixed EZP-21057: Unable to delete a content with an empty file attribute
(cherry picked from commit dafe993265680b840042fd75df9c045466bde17e)
Fix: Memory use increasing forever in SPI logger