ogma-core: Replace queueSize with QUEUE_SIZE in FPP file. Refs nasa#186.

The variable queueSize is no longer defined by default in the component
generated by fprime. This makes components generated by Ogma not compile
with the latest version of fprime.

This commit replaces the variable Default.queueSize with
Default.QUEUE_SIZE, which is defined and meant as its replacement.

ogma-core/templates/fprime/instance-copilot

@@ -1,3 +1,3 @@
   instance copilotMonitor: Ref.Copilot base id 0x2700 \
-    queue size Default.queueSize
+    queue size Default.QUEUE_SIZE