Remove unnecessary sleeps from tests

Removed unnecessary sleeps and replaced sleeps with wait_for_monitor in
some older tests. Also removed the odd arrangement of arrays in
server_weight.

maxscale-system-test/connection_limit.cpp

@@ -59,8 +59,6 @@ int main(int argc, char* argv[])
     Test->tprintf("Trying 26 connections with Readconnn slave\n");
     check_max_conn(2, 25, Test);
 
-    sleep(10);
-
     Test->check_maxscale_alive(0);
     int rval = Test->global_result;
     delete Test;