percept stop_webserver fix

[Ahmed Omar]

Fixes a bug found in percept:stop_webserver/1, where it doesn't stop the
webserver completely


percept:stop_webserver/1 will only stop the httpd service in inets, but not
the percept_httpd process. As a result, when trying to start the webserver
again it will return {error, already_started}. Test case was updated to
simulate this case and fix is included to stop the webserver in a consistent
way wether stop_webserver/0 or stop_webserver/1 was used.

git fetch git://github.com/spawnthink/otp.git *percept_web_stop*

-- 
Best Regards,
- Ahmed Omar
http://nl.linkedin.com/in/adiaa
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