ROHD-2747: Consume superfluously supplied build parameters

Docker/lofar-base/Dockerfile.tmpl

@@ -202,6 +202,16 @@ RUN aptitude install -y libqpid-proton8 libqpid-proton-cpp8 python3-qpid-proton
 # *******************
 RUN aptitude install -y python3-kombu
 
+# *******************
+#   Unconsumed build arguments
+# *******************
+
+# Apply a finger print to force a rebuild if the source code changes. Supply a unique ID here to force a rebuild.
+ARG LOFAR_FINGERPRINT=whatever
+
+# we do not use this, but will be configured to produce it
+ARG LOFAR_BASE_IMAGE_VERSION=latest
+
 #
 # entry
 #