cubicweb #4959402 make tests pass under python -R [validation pending]

We shouldn't rely on a particular ordering for iteration over sets or dicts, either in the code or in tests. Can be tested with PYTHONHASHSEED=random or the -R command line argument. This will also help with the port to python 3, since that has randomized hashing by default.
priority	normal
type	enhancement
done in	3.21.0
load	1.000
load left	0.000
closed by	<not specified>
patch	[utils] use the "predictable" argument to js_dumps [applied][server/test] don't rely on a sorted output from .object_relations() [applied][req] make rebuild_url predictable [applied][web/test] don't depend on iteration order on a set [applied][test] Don't depend on dict iteration ordering [applied][hooks/syncschema] use a list instead of a set for UpdateFTIndexOp [applied][rqlrewrite] sort possible types when turning is_instance_of into is [applied][web/views] Use predictable ordering for attributes in entity xml view [applied][web/views] set explicit order for ManageSourcesAction [applied][web/test] don't depend on dict iteration ordering [applied][sobjects/test] Fix dependency on predictable hashing [applied][test] don't rely on a stable ordering for appobject_path [applied]

from state (3)	to state	date	User
done	validation pending	2015/07/15 13:20 UTC	narval
in-progress	done	2015/06/29 09:12 UTC	jcristau
open	in-progress	2015/02/17 16:53 UTC

Ticket #4959402 - latest update on 2015/07/15, created on 2015/02/16 by Julien Cristau