Update fabric-tna to latest version

 - Includes INT changes for register
 - Includes parallel build for CI

Change-Id: I3f1f20f8b36d477a2cc1a6c5738726b1f53ae884
diff --git a/Makefile.vars b/Makefile.vars
index 3c0c220..761dfb8 100644
--- a/Makefile.vars
+++ b/Makefile.vars
@@ -32,4 +32,4 @@
 export FABRIC_TOFINO_VERSION   ?= e1cf4551b4ab74bb82a7cecf19d197698ffbc1cb
 export UP4_VERSION             ?= 74b8c5fad3315dd7d48f299abbd044b010638c13
 export KAFKA_ONOS_VERSION      ?= 2.4.0-SNAPSHOT
-export FABRIC_TNA_VERSION      ?= d23812f839926a8c5ff17327c497e83bee354470
+export FABRIC_TNA_VERSION      ?= f8ddc6270e498bee28476386f32d3fea452eb357