Adding listNodesByIds across the board.

Adding to both ListNodesStrategy and ComputeServiceAdapter. When
possible, does a query explicitly for the specified IDs. When not,
falls back on either listDetailsOnNodesMatching (for ListNodesStrategy
implementations and in BaseComputeService) or filters listNodes output
itself (in ComputeServiceAdapter).
Merge pull request #1502 from abayer/listnodesdetails-work

Adding listNodesByIds across the board.