…er to address issue #406
…eed4j impl. TimerToken iface encapsulation allows for arbitrary analysis of the Operation object as it winds its way through HConnectionManager. A TimerToken is created for each attempt at the operation. TimerTokens are held on the Operation object for HOpTimer ease of analysis
…creases risk of SchemaDisgreementExceptions. Until Cassandra 1.1 / CASSANDRA-1391 provides truly safe schema migrations, we can reduce the risk by using FailoverPolicy.FAIL_FAST, and additionally checking that schema versions agree *prior* to issuing the operation.
…on the template classes. for #400
when calling doAddNodes