ResultQuery.stream() should eagerly fetch the Result

[lukaseder]

It's too easy to forget to close a ResultQuery.stream() because that's not expected, given the rest of the jOOQ API. It's already possible to get a hold of a resourceful stream through Cursor.stream(), i.e. through ResultQuery.fetchLazy().stream().

This change would add consistency to the jOOQ API:

• ResultQuery.xxx() is always eager (including the "implicit cursor" foreach loop)
• ResultQuery.fetchLazy() and thus Cursor is always lazy and resourceful.

This is an incompatible change, which must be accompanied by a Setting. Alternatively, we can also postpone the change of the default behaviour of the Setting to 4.0...

[lukaseder]

Let's leave things as they are.