Reduce fragility of erlcloud_eqc test
Reduce fragility of erlcloud_eqc test

Fixes #398

Reduce fragility of empty object list checking in the erlcloud_eqc
test. Instead of checking the result of a call to list_objects against
a list of fixed response elements just verify the bucket name and an
empty content list.

laurenrother/riak_cs,laurenrother/riak_cs,sdebnath/riak_cs,basho/riak_cs,dragonfax/riak_cs,sdebnath/riak_cs,sdebnath/riak_cs,dragonfax/riak_cs,yangchengjian/riak_cs,yangchengjian/riak_cs,basho/riak_cs,laurenrother/riak_cs,basho/riak_cs_lfs,GabrielNicolasAvellaneda/riak_cs,GabrielNicolasAvellaneda/riak_cs,basho/riak_cs,basho/riak_cs_report,yangchengjian/riak_cs,sdebnath/riak_cs,dragonfax/riak_cs,basho/riak_cs,yangchengjian/riak_cs,laurenrother/riak_cs,GabrielNicolasAvellaneda/riak_cs,GabrielNicolasAvellaneda/riak_cs,dragonfax/riak_cs