start of mock model of cluster nodes and containers -enough to simulate location-based allocation
MockYarnEngine switched over to mock yarn cluster & allocator
BaseMockAppStateTest: make construction of engine (hence cluster size) an override point
MockYarnEngine adds static compilation
code/whitespace cleanup of mock yarn cluster classes
1. RW ordering tests verify that we get latest back
2. version header
File instance search and load implemented and executed at thaw time