Get rid of dependency on BindingTrace
Move utilities out of OverrideResolver
Remove trivial dependencies of 'serialization' module
Create DefaultDescriptorFactory utility class

Will contain utilities needed to create different common descriptors, such as
default getters/setters, enum values/valueOf methods, etc.
Refactor OverridingUtil.resolveUnknownVisibilities

Get rid of dependency on BindingTrace, move the corresponding error reporting
logic to OverrideResolver
Refactor DescriptorUtils

Remove dependency on org.jetbrains.jet.lang.psi, move utilities closer to their
usages, add NotNull annotations, fix formatting, etc.