Remove trailing whitespace

Removed trailing whitespace in tests and build scripts.

maxscale-system-test/session_hang/run_setmix.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-for ((i=0 ; i<100 ; i++)) ; 
+for ((i=0 ; i<100 ; i++)) ;
 do
 	mysql --host=$maxscale_IP -P 4006 -u $node_user -p$node_password --verbose --force --unbuffered=true --disable-reconnect $ssl_options > /dev/null < $test_dir/session_hang/setmix.sql >& /dev/null
 done