Fixed echoed Primer duration

Was incorrectly echoed as "-d 60" when it's actually sending "-d 5" to wrk.

toolset/benchmark/framework_test.py

@@ -23,7 +23,7 @@ class FrameworkTest:
     echo ""
     echo "---------------------------------------------------------"
     echo " Running Primer {name}"
-    echo " {wrk} {headers} -d 60 -c 8 -t 8 \"http://{server_host}:{port}{url}\""
+    echo " {wrk} {headers} -d 5 -c 8 -t 8 \"http://{server_host}:{port}{url}\""
     echo "---------------------------------------------------------"
     echo ""
     {wrk} {headers} -d 5 -c 8 -t 8 "http://{server_host}:{port}{url}"