Use the interval passed in instead of the constant default
Merge pull request #45 from RiotGames/cache_builder_interval

build interval ignored in favor of constant default
call CacheBuilder#build when starting rspec server for first time

this will stop tests from throwing 503 errors
Merge pull request #47 from RiotGames/build-in-rspec-serv

call CacheBuilder#build when starting rspec server for first time
Merge branch 'master' into refactor_cache_builder