Add report.py from noc.wikimedia.org/cgi-bin/report.py

Adds the old web UI, with slight modifications:

* Read configuration values from /etc/mwprof/report.cfg
* Lint to pass PEP8
* Use SCRIPT_NAME rather than hard-code 'report.py'

Change-Id: Idd61a91b42623dbbc6889e21f7522f69ad95f3f1