Only validate cassandra dir if no version specified
Only validate cassandra dir if no version specified

mambocab/ccm,tolbertam/ccm,thobbs/ccm,spodkowinski/ccm,mike-tr-adamson/ccm,tolbertam/ccm,pcmanus/ccm,unusedPhD/ccm,pcmanus/ccm,jeffjirsa/ccm,AtwooTM/ccm,pombredanne/ccm,aboudreault/ccm,mike-tr-adamson/ccm,pcmanus/ccm,umitunal/ccm,mikefero/ccm,josh-mckenzie/ccm,jorgebay/ccm,kishkaru/ccm,bcantoni/ccm,slivne/ccm,mike-tr-adamson/ccm,thobbs/ccm,mikefero/ccm,bcantoni/ccm