Author: David Mudrák
MDL-48494 admin: Fail validation of plugins with no component declared
http://git.moodle.org/gw?p=moodle.git;a=commit;h=033761fe9b555d02f6c0acc4ee956c010104968a
http://github.com/moodle/moodle/commit/033761fe9b555d02f6c0acc4ee956c010104968a
+ 3.0 en [validationmsg_missingcomponent,tool_installaddon]
+ 3.0 en [validationmsg_missingcomponent_help,tool_installaddon]
+ 3.0 en [validationmsg_missingcomponent_link,tool_installaddon]