Ticket #47596 attrcrypt fails to find unlocked key
    
    https://fedorahosted.org/389/ticket/47596
    Reviewed by: nkinder (Thanks!)
    Branch: 389-ds-base-1.2.11
    Fix Description: There should always be a pre-authenticated slot/token that
    has the servers cert and key.  Just loop through all of the slots that the
    server's cert is found on, and use the first one that is authenticated.
    Platforms tested: RHEL6 x86_64
    Flag Day: no
    Doc impact: no
    (cherry picked from commit b1fad4e35c0f963bf4678a2ed9a068dbe4fb159c)
    (cherry picked from commit cf091de4ae70ad8d683ff33c57e75e58ff900502)
    (cherry picked from commit 92b46296c0b4ab9aa436ae09bca95832e2276c6e)
    (cherry picked from commit e2d11075405898c84e50e2a98788ac4614efd2c1)