fix mongorestore and mongodump commands

[brianlball]

#250

[tijcolem]

@brianlball Nice! What it be worth adding a simple test that does a databases dump via the url get request and checks for the return code? We could probably add something in rspec.

[brianlball]

@tijcolem yep, i'm doing an rspec in the pareto branch to test out stuff that needs the full stack, like the mongo restore here.

[brianlball]

tests in the pareto PR https://github.com/NREL/OpenStudio-server/blob/pareto/server/spec/features/fullstack_spec.rb