add offset to date of'riak-cs-gc status'.
add offset to date of'riak-cs-gc status'.

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