Bump fabric-tna to avoid dropping packets to spines

https: //github.com/stratum/fabric-tna/pull/144
Change-Id: Id62ed6659fff2e4c288270538c7ccb5f1ae570c5
diff --git a/Makefile.vars.stable b/Makefile.vars.stable
index b242190..a2b5274 100644
--- a/Makefile.vars.stable
+++ b/Makefile.vars.stable
@@ -32,4 +32,4 @@
 export FABRIC_TOFINO_VERSION   ?= e1cf4551b4ab74bb82a7cecf19d197698ffbc1cb
 export UP4_VERSION             ?= 61ba80779a0f38f43da05dea9a124955a596841f
 export KAFKA_ONOS_VERSION      ?= 2.4.0
-export FABRIC_TNA_VERSION      ?= 4dd605ea3eb47633cf161f9a2e12313daffa19cb
+export FABRIC_TNA_VERSION      ?= ba6f153f72045b1af84265b954271704857bf007