Merge lp:~laurynas-biveinis/percona-server/bug1387227 into lp:percona-server/5.6

[Laurynas Biveinis]

Fix bug 1387227 (MTR --mysqld=--default-storage-engine=foo
incompatible w/ dynamically-loaded foo with non default basedir).

After fixing bug 1318537, collect_mysqld_features adds any
--plugin-load options to the mysqld invocation that checks for the
server features. That works if the actual server installation basedir
matches its default value. If it's not, the added --plugin-load option
will fail to find any plugins they reference.

Fix by passing the --basedir option to the collect_mysqld_features
mysqld invocation too.

http://jenkins.percona.com/job/percona-server-5.6-param/747/ and local TokuDB MTR test

[Laurynas Biveinis (laurynas-biveinis)]

review: Approve

=== modified file 'mysql-test/mysql-test-run.pl'
--- mysql-test/mysql-test-run.pl	2014-09-25 07:10:58 +0000
+++ mysql-test/mysql-test-run.pl	2014-10-29 18:01:09 +0000
@@ -1845,6 +1845,7 @@
   my $args;
   mtr_init_args(\$args);
   mtr_add_arg($args, "--no-defaults");
+  mtr_add_arg($args, "--basedir=%s", $basedir);
   mtr_add_arg($args, "--datadir=%s", mixed_path($tmpdir));
   mtr_add_arg($args, "--lc-messages-dir=%s", $path_language);
   mtr_add_arg($args, "--skip-grant-tables");