Cache wrapped object returned by WrapObjectHandler

[Genteure]

As discussed with @libaowei on Gitter related to #1321 and #1326, turns out they has some script that rely on some non-standard behavior of a older version of Jint. Because they want to maintain compatibility for those scripts they decided to use a custom object wrapper.

This pull request make the object wrapper cache available to WrapObjectHandler through argument, which was their original intention if I understand correctly.

[lahma]

Because there's already configuration property TrackObjectWrapperIdentity which should be respected. Would it make more sense to have another layer for retrieving the wrapper. Basically one like (pseudo):

GetWrapper {
   if cached => return cached;
   cached = TheDelegate(original params)
   return cached
}

There should be no need to expose the cache itself. So could use 90% of the original wrap handler and call the customization and store into cache.

[Genteure]

Yes it does make sense. Changed as suggested.

[Genteure]

Not sure why it's failing on linux, I can't reproduce on my Windows machine, I'll take a look tomorrow.

[lahma]

Looks good, the Linux build seems to have trouble at times. Shouldn't be related to this.

[lahma]

Thank you!