[2/2] asterixdb git commit: Index-only plan step 2: Added SplitOperator

Index-only plan step 2: Added SplitOperator - Introduced SplitOperator that sends a tuple to only one output frame unlike the ReplicateOperator that propagates a tuple into all outputs frames. - Removed PartitioningSplitOperator and PartitioningSplitOperatorDescriptor that are not

[1/2] asterixdb git commit: Index-only plan step 2: Added SplitOperator

Repository: asterixdb Updated Branches: refs/heads/master db1c115ec -> 76a4f9e36 http://git-wip-us.apache.org/repos/asf/asterixdb/blob/76a4f9e3/hyracks-fullstack/algebricks/algebricks-core/src/main/java/org/apache/hyracks/algebricks/core/algebra/operators/physical/ReplicatePOperator.java