Merge lp:~laurynas-biveinis/percona-server/bug1318537 into lp:percona-server/5.6

[Laurynas Biveinis]

Fix bug 1318537 (MTR --mysqld=--default-storage-engine=foo
incompatible w/ dynamically-loaded foo) by passing any --plugin-load*
options to mysqld during the MTR feature discovery stage.

http://jenkins.percona.com/job/percona-server-5.6-param/599/
Inspected several slaves to check that no extra tests are skipped.

[Alexey Kopytov (akopytov)]

review: Approve

=== modified file 'mysql-test/mysql-test-run.pl'
--- mysql-test/mysql-test-run.pl	2014-04-25 10:55:01 +0000
+++ mysql-test/mysql-test-run.pl	2014-05-12 15:08:24 +0000
@@ -1854,6 +1854,12 @@
     mtr_add_arg($args, "--user=root");
   }
 
+  foreach my $extra_opt (@opt_extra_mysqld_opt) {
+    if ($extra_opt =~ /--plugin-load/) {
+      mtr_add_arg($args, $extra_opt);
+    }
+  }
+
   my $exe_mysqld= find_mysqld($basedir);
   my $cmd= join(" ", $exe_mysqld, @$args);
   my $list= `$cmd`;