refs #6089 auto install tokudb plugins

git-svn-id: file:///svn/mysql.com/mysql-5.5.30@54769 c7de825b-a66e-492c-adef-691d508d4ae1
refs #6089 default storage engine is tokudb

git-svn-id: file:///svn/mysql.com/mysql-5.5.30@54807 c7de825b-a66e-492c-adef-691d508d4ae1
refs #6089 default no engine substitution

git-svn-id: file:///svn/mysql.com/mysql-5.5.30@54808 c7de825b-a66e-492c-adef-691d508d4ae1
#37 link jemalloc into mysqld
refs #6089 merge all mysql-test changes from 5.5.28 to 5.5.30

git-svn-id: file:///svn/mysql.com/mysql-5.5.30@54828 c7de825b-a66e-492c-adef-691d508d4ae1
refs #6089 add keyread_time to mysql-5.5.28 to fix a range vs index selection for tokudb.  dont go overboard so that existing myisam and innodb test continue to pass

git-svn-id: file:///svn/mysql.com/mysql-5.5.30@54831 c7de825b-a66e-492c-adef-691d508d4ae1