kjhtml reporter slows down tests by factor 2

[cburgmer]

Including the kjhtml reporter with dots will slow down my karma build by factor 2.
This may lie within the use case of this reporter, but certainly wasn't expected on my side. Clearer documentation on what this reporter is supposed to do would probably help.

Note: I didn't include this reporter in our team's pipeline, but am digging through the code months later, to understand why some of those parts are included. The team apparently added the reporter to help facilitate debugging in some cases. As for the CI build it was not required.