ipaldap: fix conversion from boolean OID to Python
    
    In IPA framework we don't properly convert to Python bool type and just
    return a string (TRUE or FALSE). This can be seen with many boolean
    attributes, like
    
            Bool('idnsallowdynupdate?',
                cli_name='dynamic_update',
                label=_('Dynamic update'),
                doc=_('Allow dynamic updates.'),
                attribute=True,
                default=False,
                autofill=True
            ),
    
    in 'ipa dnszone-show':
    
    > > > api.Command.dnszone_show('ipa.test')['result']['idnsallowdynupdate']
    ['TRUE']
    
    This is because we don't have the reverse (from LDAP to Python) mapping
    for the LDAP boolean OID 1.3.6.1.4.1.1466.115.121.1.7.
    
    When Web UI asks for the entry, it gets back JSON output that contains
    this 'TRUE' value:
    
                "idnsallowdynupdate": [
                    "TRUE"
                ],
    
    Add proper mapping from LDAP to Python bool type. With this, a simple
    'checkbox' type can be used in Web UI instead of a complex radio-box
    setup.
    
    Note that when IPA API is asked to return raw values, 'TRUE' and 'FALSE'
    still returned. These are the actual LDAP boolean attribute values. Care
    needs to be done in tests:
    
     - if output is from a command with --raw option, 'TRUE' or 'FALSE'
       should be expected
    
     - if output if from a normal (non-raw) command, True or False would be
       returned
    
    Fixes: https://pagure.io/freeipa/issue/9171
    
    Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>