Author: Dongsheng Cai
MDL-27552 get webservice token by providing username and password
http://git.moodle.org/gw?p=moodle.git;a=commit;h=13ea96c40b6bc4764837c2a17caaedefcdd38fea
http://github.com/moodle/moodle/commit/13ea96c40b6bc4764837c2a17caaedefcdd38fea
+ 2.1 en [webservice:createmobiletoken,core_role]
+ 2.1 en [cannotcreatemobiletoken,core_webservice]
+ 2.1 en [createtokenforuserauto,core_webservice]
+ 2.1 en [passwordisexpired,core_webservice]
+ 2.1 en [restoredaccountresetpassword,core_webservice]