Rename/Work around Jackson 3.0 `Module`->`JacksonModule` renaming

[cowtowncoder]

I did this:

FasterXML/jackson-databind#3037

for Jackson 3.0 (master) but did not realize that name JacksonModule was in use in Scala module.
The reason to get out of Module name is due to addition of java.lang.Module, and seems reasonable. I hope Scala module can work around this problem either via imports or (if that makes more sense) renaming its JacksonModule into something else.

[pjfanning]

@cowtowncoder I've committed a workaround

[cowtowncoder]

Thank you!

There will be more renamings but I will try to tackle them if I can.

One next step is removal of (deprecated already in 3.0) of Contextual[De]Serializer interface.

But I also really need to create a wiki doc outlining various renamings: there will be many, but they should be documented to make updates (and possible having scripts to automate) easier.

[pjfanning]

@cowtowncoder Contextual[De]Serializer is still used a lot in jackson-module-scala - what is the alternative code?

update - looks like the interfaces can just be removed as they are no longer needed - I have committed some changes

[cowtowncoder]

@pjfanning Interfaces were merged into JsonSerializer / JsonDeserializer (with no-op implementation). Same is true for Resolvable[De]Serializer, likewise removed.