support for rlt-1600g-w and rlt-1600x-w in GPON mode

Change-Id: Ib230d3e336043980eb00427384a49cb8bd386bb2

VOL-4151: Code improvement to use static const instead of static
to allow for compiler optimization.
Also fixed SECURITY.md document as the sample commands were not
ready for copy/paste earlier.

Change-Id: I7fdfa03ed3e6677466fb78b8ea8532d4f5c0a6da

Changes made to upgrade BAL from 3.4.9.8 to 3.4.9.9 for rlt-1600g/x-w and rlt-3200g-w

Change-Id: I2baa09074a43703b7ca22625592d28b03863a06c

VOL-4268: Migration to BAL3.4.9.9 for voltha master and 2.8 branch

Change-Id: I66c77149524f2592fb018a3bc00dc9c8a8f94153
diff --git a/agent/test/Makefile b/agent/test/Makefile
index a6e983d..24a4382 100644
--- a/agent/test/Makefile
+++ b/agent/test/Makefile
@@ -41,7 +41,7 @@
 
 export CXX CXXFLAGS OPENOLT_PROTO_VER
 
-BAL_API_VER ?= bal-api-3.4.9.6
+BAL_API_VER ?= bal-api-3.4.9.9
 BAL_API_DIR=$(BAL_API_VER)
 BALLIBNAME=bcm_host_api_stubs
 BALLIBDIR=$(BAL_API_DIR)/stubs