Reorder work in EventHandlers#onBeforeRequest to increase speed

[wlycdgr]

EventHandlers#onBeforeRequest currently calls isBug before calling PolicySmartBlock.isInsecureRequest and returning immediately if that second call returns true. But this second call does not rely on the results of the expensive call to isBug, which also does not produce any side effects I've been able to notice. So I moved the isBug call below the call to isInsecureRequest.

• Have you followed the guidelines in CONTRIBUTING.md?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you added an explanation of what your changes do?
• Does your submission pass tests?
• Did you lint your code prior to submission?