[entity] rename Entity._rest_attr_info into cw_rest_attr_info (closes #1942759)

[entity] upgrade fetch_[unrelated_]order to benefit from changes introduced in 3.14 (closes #1942758) of rql generation parts of the ORM now based on rql syntax tree. This allows more powerful and flexible sort control by giving them the syntax tree instead of manipulating string. Also: * prefix new methods by 'cw_' * fix cases that currently crash in 3.14 due to the refactoring

[schema] drop CWSourceSchemaConfig[cw_for_source,cw_schema] unique constraint (closes #1946277) as they are not necessarily unique, eg when one want a configuration for both subject and object

[cleanup]

[jsoncontroller] deprecate the now unused js_set_cookie (closes #1944810)

[repo] ensure we don't restart a task while the repo is shutting down (closes #1942736) we need a safety belt in cw itself again looping task which use 'try / except' or doesn't need to access the db (which will trigger ShuttingDown exception)

[warnings] explicitly ask to show DeprecationWarning in debug mode (closes #1942760) as python 2.7 don't show DeprecationWarning by default

[testlib] make self.view() return raw output if no validator is used This will make it possible to parse and test view's output even if no validator is associated to the view's content type.

[tabs] do not use an ajax call to set cookie value, use jquery.cookie helper instead (closes #1944522)

[tabs] fix clic on tab that does nothing (closes #1942750) (there was an area around the text that would trigger the tab switch but not load the tab content)

[idownloadable] dtw and up copyright

[test] fix test broken by 7815:2a164a9cf81c

[entity doc] fix typo (rest_var instead of rest_attr) and cleanup doc

[exceptions] stop catching any exception in various places (closes #1942716)