Move the "use lib" directive to mtr.pl

mysql-test/lib/mtr_cases.pl

@@ -22,7 +22,6 @@ use File::Basename;
 use IO::File();
 use strict;
 
-use lib "lib/";
 use My::Config;
 
 sub collect_test_cases ($);

mysql-test/mysql-test-run.pl

@@ -52,6 +52,9 @@
 # "perl -d:Trace mysql-test-run.pl"
 #
 
+
+use lib "lib/";
+
 $Devel::Trace::TRACE= 0;       # Don't trace boring init stuff
 
 #require 5.6.1;