Merge pull request #976 from ahgittin/misc

some minor fixes - cassandra test, and some out-of-date text
Updated CumulusRDF demo application
Updated application to fix issues with startup
Fix TomcatServer JMX startup and some code tidying
Merge pull request #972 from grkvlt/cumulusrdf

Updated CumulusRDF demo application
Fix examples download url (for snapshot)
fix quote for download
Fix cassandra tutorial's mention of cumulusrdf
Add examples link to nosql-cassandra
bump to jclouds 1.6.2
synch when assigning ports on SSH machines, to prevent race/conflicts
tidy, and allow Map.copyOf(null) to return an empty map (which i think is the common use case)
include both createNode impls in the call path in case either is overridden