test: mock out requests
refactor slightly, add another test
test query submission, validation, status, etc
cover only myria package -- following datalogcompiler
check util works
query: better testing of submit
test workers
test_query: simplify
Merge pull request #4 from uwescience/dhalperi-use-requests

[WIP] Dhalperi use requests
Merge remote-tracking branch 'origin/master' into query-vis-new
Test getting the logs (broken)