Association dialogs were using non-existent options for find commands. It causes error when #2509 is implemented.
Now when creating a find command a check for options existence is performend. Option is not used if not present in metadata. It fixes the issue.
https://fedorahosted.org/freeipa/ticket/2760
The json_metadata command has been modified to accept some new
options and return the commands metadata. The API.txt has been
updated as well. The UI has been modified to use commands metadata
instead of methods metadata.
Ticket #388