Controller Label Average column in Report summaries values of slaves

**tswiftma** ([Bug 63278](https://bz.apache.org/bugzilla//show_bug.cgi?id=63278&redirect=false)):
After you generate an HTML report of results from data with multiple slaves (ex. 4 slaves), the controller Label displays the SUM of the slave averages. A sum value really makes no sense here at all, it should be an average of the slave results. It is very misleading.

For example, I have an API request for signout. JMeter currently displays the controller result as the sum of the average of the slave results. Instead of [Bug 12206](https://bz.apache.org/bugzilla//show_bug.cgi?id=12206&redirect=false) ms it should be the average of the 4 slave results or 3051 ms

/api/accounts/signout       12206 ms (controller result)
/api/account/signout-0      2739 ms
/api/accounts/signout-1       4227 ms
/api/accounts/signout-2       2694 ms
/api/accounts/signout-3       2545 ms

Severity: normal
OS: