configuration: introduce XmlConfigFile dependency on ConfigFile

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
configuration: typo fixed

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
configuration: rename ConfigFile to DeprecatedConfigurationApi

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
configuration: include cleanup

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
configuration: small modernization of DeprecatedConfigurationApi code

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
configuration: remove polish comments

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
configuration: rename XmlConfigFile to ConfigurationApi

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
configuration: introduce ConfigurationStorage

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>