tree 0666c6ecbb1c15f942c575df7c2b66deb7450555
parent 8c2482933ad455b44da8a9eefed69f5dd7c6d983
author Matthew Treinish <mtreinish@kortar.org> 1425692221 -0500
committer Matthew Treinish <mtreinish@kortar.org> 1425693007 +0000

Add check on role availability before request creds by roles

This commit adds a new method to the cred_provider abstract class,
is_role_available(), which will return true if the provider can provide
creds with the request roles, or false if it can't. This method is then
used before any calls to get_creds_by_roles() to definitively check
whether the test is expected to be able to be executed.

Closes-Bug: #1429322
Change-Id: I00f61007b2b0605c07ac77773151562c5cf6ce85