Merge lp:~sergei.glushchenko/percona-server/5.5-ps-bug1320879 into lp:percona-server/5.6

[Sergei Glushchenko]

Bug 1320879: multiple issues when checking audit.log with xmllint
- fixed XML attribute names
- wrapped log by XML tag <audit>
- added XML declaration at the beginning of the file
- expanded test case to verify log with XML parser
- escape not only query text but also other string values
This makes xmllint to stop complaining and also makes
mysqlauditgrep from MySQL tools to work with audit log generated
by PS audit log plugin.
Blueprint
https://blueprints.launchpad.net/percona-server/+spec/audit-log-csv-json
- variable audit_log_format to accept additional options JSON and CSV
- expanded test case to produce JSON and CSV logs and validate them

http://jenkins.percona.com/view/PS%205.5/job/percona-server-5.5-param/1000/

[Laurynas Biveinis (laurynas-biveinis)]

Wrong target branch?

review: Needs Resubmitting