config: provide defaults for xmlrpc_uri, ldap_uri and basedn

Derive the default value of `xmlrpc_uri` and `ldap_uri` from `server`.
Derive the default value of `basedn` from `domain`.

Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>

makeapi

@@ -40,7 +40,6 @@ from ipalib.parameters import Param
 from ipalib.output import Output
 from ipalib.text import Gettext, NGettext, ConcatenatedLazyText
 from ipalib.capabilities import capabilities
-from ipapython.dn import DN
 
 API_FILE='API.txt'
 
@@ -514,11 +513,8 @@ def main():
         enable_ra=True,
         mode='developer',
         plugins_on_demand=False,
-        basedn=DN(('dc', 'example'), ('dc', 'com')),
         realm="EXAMPLE.COM",
         domain="example.com",
-        xmlrpc_uri="http://localhost:8888/ipa/xml",
-        ldap_uri="ldap://localhost:389",
     )
 
     api.bootstrap(**cfg)