generalization of mtr to support suite.pm extensions:

* no automatic --loose-skip-innodb added by mtr based on the test name.
  instead loose-skip-innodb is now in the default_mysqld.cnf
* have_innodb_plugin.inc is changed to give a verbose "skip" message
  (instead of "require: true")
* My::Suite class. It's support in mtr, and everywhere
* support for suite.pm
* when sorting tests, take combinations into account
* support for SUITENAME_COMBINATIONS
* no special treatment for innodb_plugin in mtr_cases.pm
* two special pre-created config groups: ENV and OPT
* allow option names to start from #
* allow magic option to have an argument
* remove dead code
* fix @-substitution to works as expected
* new processes take the value of $opt_verbose automatically, no need to pass it to a constructor
* innodb_plugin suite uses suite.pm and combinations file to test as much as possible
  (innodb plugin, xtradb plugin, xtradb static - whatever available)
* besides test-master.opt and test-slave.opt a test.opt file is also
  loaded, both for master and slave
* .opt files for all included files are loaded too
* progress report in the xterm titlebar

mysql-test/suite/innodb/t/innodb-master.opt

@@ -1 +1 @@
---binlog_cache_size=32768 --innodb_lock_wait_timeout=1
+--binlog_cache_size=32768 --loose-innodb_lock_wait_timeout=1

mysql-test/suite/innodb/t/innodb-semi-consistent-master.opt

@@ -1 +1 @@
---innodb_lock_wait_timeout=2
+--loose-innodb_lock_wait_timeout=2

mysql-test/suite/innodb/t/innodb_autoinc_lock_mode_zero-master.opt

@@ -1 +1 @@
---innodb-autoinc-lock-mode=0
+--loose-innodb-autoinc-lock-mode=0

mysql-test/suite/innodb/t/innodb_bug30919-master.opt

@@ -1 +1 @@
---innodb --innodb_autoinc_lock_mode=0
+--loose-innodb --loose-innodb_autoinc_lock_mode=0

mysql-test/suite/innodb/t/innodb_bug39438-master.opt

@@ -1 +1 @@
---innodb-file-per-table=1
+--loose-innodb-file-per-table=1

mysql-test/suite/innodb/t/innodb_bug52663-master.opt

@@ -1 +1 @@
---innodb_lock_wait_timeout=1
+--loose-innodb_lock_wait_timeout=1

mysql-test/suite/innodb/t/innodb_bug53674-master.opt

@@ -1 +1 @@
---log-bin --innodb-locks-unsafe-for-binlog --binlog-format=mixed
+--loose-innodb-locks-unsafe-for-binlog --binlog-format=mixed

mysql-test/suite/innodb/t/innodb_bug53674.test

@@ -1,4 +1,5 @@
 -- source include/have_innodb.inc
+-- source include/have_log_bin.inc
 
 create table bug53674(a int)engine=innodb;
 insert into bug53674 values (1),(2);

mysql-test/suite/innodb/t/innodb_lock_wait_timeout_1-master.opt

@@ -1 +1 @@
---innodb_lock_wait_timeout=1
+--loose-innodb_lock_wait_timeout=1

mysql-test/suite/innodb/t/innodb_misc1-master.opt

@@ -1 +1 @@
---binlog_cache_size=32768 --innodb_lock_wait_timeout=1
+--binlog_cache_size=32768 --loose-innodb_lock_wait_timeout=1

mysql-test/suite/innodb/t/innodb_mysql-master.opt

@@ -1 +1 @@
---innodb-lock-wait-timeout=2
+--loose-innodb-lock-wait-timeout=2

mysql-test/suite/innodb/t/innodb_mysql_rbk-master.opt

@@ -1 +1 @@
---innodb_lock_wait_timeout=1 --innodb_rollback_on_timeout=1
+--loose-innodb_lock_wait_timeout=1 --loose-innodb_rollback_on_timeout=1

mysql-test/suite/innodb/t/innodb_timeout_rollback-master.opt

@@ -1 +1 @@
---innodb_lock_wait_timeout=2 --innodb_rollback_on_timeout
+--loose-innodb_lock_wait_timeout=2 --loose-innodb_rollback_on_timeout