[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>
Use the new defined nexus.configuration.version property in nexus.xml

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
[NEXUS-5690] Drop "blockInheritance" as it is obsolete after dropping per repository http proxy settings

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
[NEXUS-5690] Drop httpProxySettings from REST VO/Resource

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
[NEXUS-5690] Drop RemoteProxySettings & ProxySelector from ProxyRepository

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
[NEXUS-5690] Drop proxy settings from repository UI edit panel

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
[NEXUS-5690] Drop obsolete ITs that were testing http proxy defined at repository level

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