Squash this commit with the previous commit if it pass code review

The ability to have custom result directory for the certain options combination
was added to MTR. To use it just add option "mtr-result-dir" in the certain
options group in 'combinations' file.

The ability to add only the certain list of tests for the certain option
combination is added to MTR. For this purpose the new "mtr-tests-list" option
is introduced. This option contains comma-separated list of tests in the
current suite, which will be executed for the current options combination.

As an example of the new options see changed and newly created "combination"
files of this commit.

The above features are used to test TokuDB and RocksDB native and non-native
partitioning, that is why the corresponding test suits have two directories
for result files for one directory of tests.

mysql-test/lib/mtr_cases.pm

@@ -545,7 +545,17 @@ sub collect_one_suite($)
 	my $comb= {};
 	$comb->{name}= $group->name();
         foreach my $option ( $group->options() ) {
-	  push(@{$comb->{comb_opt}}, $option->option());
+        my $option_string = $option->option();
+        if ($option_string =~ m/--mtr[-_]result[-_]dir\s*=\s*(.+)/) {
+          mtr_verbose("The result dir was changed to $1");
+          $comb->{result_dir} = $1;
+        } elsif ($option_string =~ m/--mtr[-_]tests[-_]list\s*=\s*(.+)/) {
+          my @comb_tests_array = split (/,/, $1);
+          my %comb_tests_set = map { $_ => 1 } @comb_tests_array;
+          $comb->{tests_set} = \%comb_tests_set;
+        } else {
+          push(@{$comb->{comb_opt}}, $option->option());
+        }
 	}
 	push(@combinations, $comb);
       }
@@ -564,6 +574,8 @@ sub collect_one_suite($)
 
 	  next if ( $test->{'skip'} );
 
+    next if ($comb->{tests_set} and not
+             $comb->{tests_set}->{$test->{shortname}});
 	  # Skip this combination if the values it provides
 	  # already are set in master_opt or slave_opt
 	  if (My::Options::is_set($test->{master_opt}, $comb->{comb_opt}) &&
@@ -585,6 +597,16 @@ sub collect_one_suite($)
 	  push(@{$new_test->{master_opt}}, @{$comb->{comb_opt}});
 	  push(@{$new_test->{slave_opt}}, @{$comb->{comb_opt}});
 
+    if ($comb->{result_dir}) {
+      my $result_file = "$suitedir/$comb->{result_dir}/".
+                        "$new_test->{shortname}.result";
+      if (-f $result_file) {
+        $new_test->{result_file} = $result_file;
+      } else {
+        $new_test->{record_file} =  $result_file;
+      }
+    }
+
 	  # Add combination name short name
 	  $new_test->{combination}= $comb->{name};
 

mysql-test/suite/parts/inc/disable_native_partitioning.inc

@@ -0,0 +1,27 @@
+--let $MYSQLD_DATADIR=`select @@datadir`
+
+--let $restart_parameters = "restart: --loose-$disable_native_partition_opt=0"
+--source include/restart_mysqld.inc
+
+eval CREATE TABLE t1 (a INT UNSIGNED NOT NULL, PRIMARY KEY(a)) ENGINE = $engine
+PARTITION BY RANGE (a) (
+    PARTITION p0 VALUES LESS THAN (100),
+    PARTITION p1 VALUES LESS THAN (200)
+);
+
+--list_files $MYSQLD_DATADIR/test *.par
+
+DROP TABLE t1;
+
+--let $restart_parameters = "restart: "
+--source include/restart_mysqld.inc
+
+eval CREATE TABLE t1 (a INT UNSIGNED NOT NULL, PRIMARY KEY(a)) ENGINE = $engine
+PARTITION BY RANGE (a) (
+    PARTITION p0 VALUES LESS THAN (100),
+    PARTITION p1 VALUES LESS THAN (200)
+);
+
+--list_files $MYSQLD_DATADIR/test *.par
+
+DROP TABLE t1;

mysql-test/suite/rocksdb.rpl/combinations

@@ -12,3 +12,25 @@ binlog-format=statement
 
 [mix]
 binlog-format=mixed
+
+[row-write-committed-native-partitioning]
+mtr-result-dir = r-native-partitioning
+mtr-tests-list = rpl_rocksdb_extra_col_slave
+binlog-format=row
+loose-rocksdb_write_policy=write_committed
+loose-rocksdb-enable-native-partition=on
+
+[row-write-prepared-native-partitioning]
+mtr-result-dir = r-native-partitioning
+mtr-tests-list = rpl_rocksdb_extra_col_slave
+binlog-format=row
+loose-rocksdb_write_policy=write_prepared
+loose-rocksdb_commit_time_batch_for_recovery=on
+loose-rocksdb-enable-native-partition=on
+
+[stmt-native-partitioning]
+mtr-result-dir = r-native-partitioning
+mtr-tests-list = rpl_skip_trx_api_binlog_format
+binlog-format=statement
+loose-rocksdb-enable-native-partition=on
+