lib: Rename HTTPStateManager related tests.
lib: Rename HTTPStateManager related tests.

- This makes them easy to run individually using the go test -run flag.

samsalisbury/sous,opentable/sous,samsalisbury/sous,opentable/sous,opentable/sous,samsalisbury/sous,opentable/sous,samsalisbury/sous,opentable/sous,samsalisbury/sous