Report logic may not be able to find the hyperledger caliper logo when new docs are deployed

[davidkel]

packages/caliper-core/lib/manager/report/template/report.html has the following line

<img src="https://caliper.github.io/caliper/assets/img/hyperledger_caliper_logo_color.png" style="width:95%;" alt="">

this may not work anymore even if changed to

<img src="https://hyperledger-caliper.github.io/caliper/assets/img/hyperledger_caliper_logo_color.png" style="width:95%;" alt="">

When the new docs are published.

So when the new docs are published we should do a quick fix now that references the correct location, but in the future we need a more robust way of getting this image, most likely put the graphic into the caliper-core reports directory and be able to reference it from there.