Use array-maps explicitly for serializer collections.
Use array-maps explicitly for serializer collections.

This patch converts the {} reader macros on clojure-primitives
and java-primitives to use array-map explicitly. I think Clojure
uses array-maps by default for small maps; I'm not sure, though,
and if {} created a hash-map with different  ordering when populating
two different instances of kryo, deserialization will fail.

sritchie/carbonite