Fixed association facets.

The association config has been removed because it incorrectly assumes there is only one association between two entities. Now each association is defined separately using association facets.

The service.py has been modified to specify the correct relationships. The API.txt has been updated.

https://fedorahosted.org/freeipa/ticket/960

install/ui/dialog.js

@@ -512,7 +512,6 @@ IPA.deleter_dialog =  function (spec) {
     var that = IPA.dialog(spec);
 
     that.title = spec.title || IPA.messages.button.remove;
-    that.remove = spec.remove;
 
     that.values = spec.values || [];
 
@@ -546,7 +545,7 @@ IPA.deleter_dialog =  function (spec) {
 
     that.open = function(container) {
         that.buttons = {
-            'Delete': that.remove,
+            'Delete': that.execute,
             'Cancel': that.close
         };