Integrate new Result into ORM query

The next step in the 2.0 ORM changes is to have the
ORM integrate with the new Result object fully.

this patch uses Result to represent ORM objects rather
than lists.  public API to get at this Result is not
added yet.   dogpile.cache and horizontal sharding
recipe/extensions have small adjustments to accommodate
this change.

Callcounts have fluctuated, some slightly better and
some slightly worse.  A few have gone up by a bit,
however as the codebase is still in flux it is anticipated
there will be some performance gains later on as
ORM fetching is refined to no longer need to accommodate
for extensive aliasing.   The addition of caching
will then change the entire story.

References: #5087
References: #4395

Change-Id: If1a23824ffb77d8d58cf2338cf35dd6b5963b17f

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