PutMapCommand should not trigger remote gets for keys when using DIST

See http://www.jboss.org/index.html?module=bb&op=viewtopic&t=161077 and http://lists.jboss.org/pipermail/infinispan-dev/2009-September/001457.html

Essentially, the DistributionInterceptor attempts to perform a clustered get for all keys in a map passed into PutMapCommand. This is unnecessary.