Report Statistics in smart remote repo is broken, if target URL is running Artifactory in root context

Steps to reproduce:
1. Use this KB to make Artifactory run without the `/artifactory` context (ROOT)
2. Start another Artifactory instance and create a Smart Remote Repository pointing to one of the local repos in the first instance
3. Make sure to tick the "Report Statistics" checkbox
4. Download something from the "remote" repo, and then from the "cache", in order to trigger the "report statistics" mechanism

The bug:
The request is reaching Artifactory like this (note the generic-local repo name before the `/api`:

20190507161237|28|REQUEST|RESTRICTED_IP|admin|PUT|/generic-local/api/storage/statistics/generic-local|HTTP/1.1|201|208

Therefore, it actually creates a file under this path: /generic-local/api/storage/statistics/generic-local

Instead, it should look like this:

20190507161237|28|REQUEST|RESTRICTED_IP|admin|PUT|/api/storage/statistics/generic-local|HTTP/1.1|201|208