UTF8 instead of ISO-8859-1 by default for sampleresult.default.encoding

**Sebastian Boga** ([Bug 65834](https://bz.apache.org/bugzilla//show_bug.cgi?id=65834&redirect=false)):
When a browser get response from server through HTTP protocol, all chars are returned as UTF-8 encoded.

By default in jmeter.properties file, it is set for for sampleresult.default.encoding=ISO-8859-1

It would be better to have set the sampleresult.default.encoding=UTF-8 by default in jmeter.properties file to have HTTP Request behaving more closely to the browser.

Where do this have impact?
When using RegEx to extract some part from response, for cases where we have white spaces like   in HTML, we got some  character instead of space. We had to update manually jmeter.properties file in order to be able to extract the string we wanted.

Severity: normal
OS: All