Move the InnoDB Plugin tests from storage/innodb_plugin/mysql-test/ where

they are ignored to a new test suite "innodb_plugin".

Remove a hack in mtr that was deployed to run the builtin InnoDB tests against
the InnoDB Plugin. Also detect if a test is an 'innodb plugin test' and if so
then transparently replace the builtin InnoDB with the InnoDB Plugin.

mysql-test/suite/innodb_plugin/include/innodb_trx_weight.inc

@@ -0,0 +1,51 @@
+-- connect (con1,localhost,root,,)
+-- connect (con2,localhost,root,,)
+
+-- connection con1
+SET autocommit=0;
+SELECT * FROM t1 FOR UPDATE;
+-- if ($con1_extra_sql_present) {
+	-- eval $con1_extra_sql
+-- }
+
+-- connection con2
+SET autocommit=0;
+SELECT * FROM t2 FOR UPDATE;
+-- if ($con2_extra_sql_present) {
+	-- eval $con2_extra_sql
+-- }
+
+-- if ($con1_should_be_rolledback) {
+	-- connection con1
+	-- send
+	INSERT INTO t2 VALUES (0);
+
+	-- connection con2
+	INSERT INTO t1 VALUES (0);
+	ROLLBACK;
+
+	-- connection con1
+	-- error ER_LOCK_DEADLOCK
+	-- reap
+-- }
+# else
+-- if (!$con1_should_be_rolledback) {
+	-- connection con2
+	-- send
+	INSERT INTO t1 VALUES (0);
+
+	-- connection con1
+	INSERT INTO t2 VALUES (0);
+	ROLLBACK;
+
+	-- connection con2
+	-- error ER_LOCK_DEADLOCK
+	-- reap
+-- }
+
+-- connection default
+
+DELETE FROM t5_nontrans;
+
+-- disconnect con1
+-- disconnect con2