Author: Paul Holden
MDL-62915 tool_dataprivacy: don't let primary admin delete themselves.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e8c2c263b7e7a7c4bcdcb1256f39ef273e14081c
http://github.com/moodle/moodle/commit/e8c2c263b7e7a7c4bcdcb1256f39ef273e14081c
+ 3.6 en [errorcannotdeleteadmin,tool_dataprivacy]