processes: use 200ms CPU measure time to get actual results, previous implementation showed 0 most of the time.

rhodecode/apps/admin/views/process_management.py

@@ -47,7 +47,7 b' class AdminProcessManagementView(BaseApp'
                 'name': proc.name(),
                 'mem_rss': mem.rss,
                 'mem_vms': mem.vms,
-                'cpu_percent': proc.cpu_percent(),
+                'cpu_percent': proc.cpu_percent(interval=0.2),
                 'create_time': proc.create_time(),
                 'cmd': ' '.join(proc.cmdline()),
             })