orswot_eqc.erl causes riak_dt tests to appear to fail

If you don't have EQC installed, orswot_eqc won't compile, which
looks bad. If def out that eqc stuff.
Merge pull request #106 from basho/bug/rdb/orswo-eqc-cond-comp

orswot_eqc.erl causes riak_dt tests to appear to fail

Reviewed-by: seancribbs