Addressed Eric's comments on #300 epsilon-greedy bandit.
Merge pull request #346 from Yelp/norases_343_address_erics_comments_on_epsilon_greedy

Clean up epsilon-greedy bandit
now if the POST has num_multistarts=0 or num_random_samples=0, we will error or handle appropriately
previously we would overwrite w/the default value. now if the user has specified something, we will
alert them
Merge branch 'master' of github.com:yelp/MOE into eliu_gh_186_189_345_cleanup_and_make_optimizer_arguments_consistent_fix_0_multistarts_bug