Match purpose should be entirely removed from authentication-context, see [1]. It means it should be removed from API, Elytron subsystem and Elytron client configuration file.

We request blocker flag to avoid situation where match-purpose occurs in GA.

[1] https://issues.jboss.org/browse/JBEAP-11144?focusedCommentId=13413867&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13413867