[NEXUS-5690] Remove per repository proxy settings from Nexus configuration (nexus.xml) -> new version v2.5.0

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
[NEXUS-5690] Filter expected result files so we do not have to update them everytime configuration version changes

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>