Update config to allow test-specific settings
Required to support #44 (closed) and #45 (closed), but opens up a framework for other settings. With this, move pageLoadTimeThreshold under pageLoadTimeTest (breaking).
Edited by Aaron Goldenthal
Required to support #44 (closed) and #45 (closed), but opens up a framework for other settings. With this, move pageLoadTimeThreshold under pageLoadTimeTest (breaking).