[2/2] asterixdb git commit: [ASTERIXDB-2184] Add Immutable DiskBTree

[ASTERIXDB-2184] Add Immutable DiskBTree - user model changes: no - storage format changes: no - interface changes: no Details: - Add a immutable DiskBTree to for LSM disk components. This DiskBTree only supports two operations, i.e., search and bulkload. No concurrency control is performed at

[1/2] asterixdb git commit: [ASTERIXDB-2184] Add Immutable DiskBTree

Repository: asterixdb Updated Branches: refs/heads/master 6a588669c -> 73d9acaf7 http://git-wip-us.apache.org/repos/asf/asterixdb/blob/73d9acaf/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-btree-test/src/test/java/org/apache/hyracks/storage/am/btree/DiskBTreeSearchCursorTest.java