VOL-1318 OpenOLT Containerization

Committing following changes:
1. Skelaton code - methods and variables
2. Docker container initialization fixes
3. OpenOLT adapter successful registration with Core

Change-Id: I2b5d5a3c2dd049fa76d6f9dc0647e2c2d4408085
diff --git a/protos/device.proto b/protos/device.proto
index 61056e6..16186fa 100644
--- a/protos/device.proto
+++ b/protos/device.proto
@@ -30,6 +30,7 @@
 
     bool accepts_bulk_flow_update = 3;
     bool accepts_add_remove_flow_updates = 4;
+    bool accepts_direct_logical_flows_update = 7;
 
 }