SubGraphs do not inherit Self from parent graph

Steps to reproduce:

1. Download and import the attached "Behavior Repro Subgraph Self Null.unitypackage"
2. Open "scene"
3. Enter play mode
4. Observe the console

Actual results: The console logs "[Agent] Self = null"

Expected results: The console DOES NOT log "[Agent] Self = null"

Reproducible with versions: 
1.0.9

Tested on (OS): MacOS