admin: update cassandra monitor to work with cassandra 2.1.2, which has different output format
admin: update cassandra monitor to work with cassandra 2.1.2, which has different output format

tscholl2/smc,DrXyzzy/smc,sagemathinc/smc,DrXyzzy/smc,tscholl2/smc,sagemathinc/smc,tscholl2/smc,DrXyzzy/smc,tscholl2/smc,sagemathinc/smc,DrXyzzy/smc,sagemathinc/smc,tscholl2/smc