support more DateTime attributes in LDAP searches in IPA API
    
    LDAPSearch class constructs a filter from a set of attributes and their
    values passed in by the command. During this construction process a
    limited set of attributes gets converted to a special form, the rest is
    simply taken as a string and escaped according to LDAP rules.
    
    This means DateTime class would simply be converted to string using
    str(DateTime) and that uses default formatting method. For LDAP we need
    to apply a specific formatting method instead.
    
    Following LDAP attributes now handled as datetime.datetime:
    
     ( 1.3.6.1.4.1.5322.21.2.5 NAME 'krbLastAdminUnlock' EQUALITY generalizedTimeMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 SINGLE-VALUE)
     ( 2.16.840.1.113719.1.301.4.6.1 NAME 'krbPrincipalExpiration' EQUALITY generalizedTimeMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 SINGLE-VALUE)
     ( 2.16.840.1.113719.1.301.4.37.1 NAME 'krbPasswordExpiration' EQUALITY generalizedTimeMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 SINGLE-VALUE)
     ( 2.16.840.1.113719.1.301.4.45.1 NAME 'krbLastPwdChange' EQUALITY generalizedTimeMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 SINGLE-VALUE)
     ( 2.16.840.1.113719.1.301.4.48.1 NAME 'krbLastSuccessfulAuth' EQUALITY generalizedTimeMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 SINGLE-VALUE)
     ( 2.16.840.1.113719.1.301.4.49.1 NAME 'krbLastFailedAuth' EQUALITY generalizedTimeMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 SINGLE-VALUE)
     ( 2.16.840.1.113730.3.8.16.1.3  NAME 'ipatokenNotBefore' DESC 'Token validity date' EQUALITY generalizedTimeMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 SINGLE-VALUE X-ORIGIN 'IPA OTP')
     ( 2.16.840.1.113730.3.8.16.1.4  NAME 'ipatokenNotAfter' DESC 'Token expiration date' EQUALITY generalizedTimeMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 SINGLE-VALUE X-ORIGIN 'IPA OTP')
    
    Fixes: https://pagure.io/freeipa/issue/9395
    
    Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Antonio Torres <antorres@redhat.com>