Merge MySQL 5.6.30

Registered by Laurynas Biveinis

https://github.com/percona/percona-server/pull/511

Merge MySQL 5.6.30.

Verify and revert upstream fix for https://bugs.launchpad.net/percona-server/+bug/1475107 / http://bugs.mysql.com/bug.php?id=77684, keep our testcase if necessary.

Revert Percona fix for upstream Bug#79185 (https://bugs.launchpad.net/percona-server/+bug/1519094) as it was fixed by Oracle (commits 93e6f38).

Add missing testcases for:
1. Oracle Bug#74578.
2. Oracle Bug#73556 / lp:1354011
These tests should have been included in 5.6.28.

Blueprint information

Status:
Complete
Approver:
Laurynas Biveinis
Priority:
Essential
Drafter:
Laurynas Biveinis
Direction:
Approved
Assignee:
Yura Sorokin
Definition:
Approved
Series goal:
Accepted for 5.6
Implementation:
Implemented
Milestone target:
milestone icon 5.6.30-76.3
Started by
Yura Sorokin
Completed by
Yura Sorokin

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