tokudb.i_s_tokudb_lock_waits_released is unstable

Seems still a bit unstable

http://jenkins.percona.com/view/PS%205.6/job/percona-server-5.6-param/1106/BUILD_TYPE=debug,Host=ubuntu-wily-64bit/console

Try #2:
5.6:
https://github.com/georgelorchpercona/percona-server/tree/ps-5.6-DB-964
http://jenkins.percona.com/view/PS%205.6/job/percona-server-5.6-param/1197/
https://github.com/percona/percona-server/pull/623

5.7:
https://github.com/georgelorchpercona/percona-server/tree/ps-5.7-DB-964
http://jenkins.percona.com/view/5.7/job/mysql-5.7-param/214/
https://github.com/percona/percona-server/pull/624

Issue still appears randomly on trunk builds http://jenkins.percona.com/view/PS%205.6/job/percona-server-5.6-trunk/629/

Let's try this one more time:
https://github.com/georgelorchpercona/percona-server/tree/ps-5.6-DB-964
http://jenkins.percona.com/view/PS%205.6/job/percona-server-5.6-param/1348/
https://github.com/percona/percona-server/pull/948

https://github.com/georgelorchpercona/percona-server/tree/ps-5.7-DB-964
http://jenkins.percona.com/view/5.7/job/mysql-5.7-param/385/
https://github.com/percona/percona-server/pull/949