8c1f3b2 IDMAP: Add test to validate off by one bug

1 file Authored by preichl 8 years ago, Committed by lslebodn 8 years ago,
    IDMAP: Add test to validate off by one bug
    
    Resolves:
    https://fedorahosted.org/sssd/ticket/2922
    
    Reviewed-by: Pavel Březina <pbrezina@redhat.com>
    Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>
    Reviewed-by: Michal Židek <mzidek@redhat.com>
    (cherry picked from commit 9d17f436795a36b1b1126f444923aa847fd0f93a)