Fix image name and drop tost terminology once for all

This change makes sure that we can produce a Docker image correctly tagged
as opennetworking/sdfabric-onos.

Moreover, we attempt to reduce confusion by dropping entirely the term
tost from the Makefile, README, and scripts. This should improve
maintenability going forward. TOST is now mentioned only to refer to the
onos build profile.

Change-Id: Ia2fdb022423279f15c53c6e101488cb3c937ad82
diff --git a/app-build.sh b/app-build.sh
index 1e9408c..4fd9d48 100755
--- a/app-build.sh
+++ b/app-build.sh
@@ -143,7 +143,7 @@
 			-Dmdep.useBaseVersion=true -Dmdep.overWriteReleases=true -Dmdep.overWriteSnapshots=true -f dependencies.xml \
 			-s mvn_settings.xml"
 	fi
-	# Final step requires to move the oar to the folder used by the tost docker file. Moreover, it will help catch up errors
+	# Final step requires to move the oar to the folder used by Dockerfile. Moreover, it will help catch up errors
 	cp "${TRELLIS_CONTROL_OAR}" "${LOCAL_APPS}"/
 }