conf/cassandra_BASE.yaml has path to eiger hard coded

[tadeegan]

Noticed this when trying to run the multidc tests. The path should be generated dynamically.

/Users/wlloyd/Documents/widekv/cassandra2/

[wlloyd]

Good catch, thanks. I believe there are also a couple other places where things are hard coded too. We'll find and fix these after the SOSP deadline in a few weeks. I'll leave this open until then.