Display more information on DB version mismatch
    
    https://fedorahosted.org/sssd/ticket/1589
    
    Added check for determining, whether database version is higher or
    lower than expected. To distinguish it from other errors it uses
    following retun values (further used for appropriate error message):
    EMEDIUMTYPE for lower version than expected
    EUCLEAN for higher version than expected
    
    When SSSD or one of it's tools fails on DB version mismatch, new error
    message is showed suggesting how to proceed.