[sources] Check sources configuration is fine on creation/modification
Reintroduce usage of 'source.check_config' which had almost disappeared, as
well as tests for the currently detected errors.
Part of the system source specific checking done in syncsources reimplemented in
a specific check_config implementation.
Tests are dispatched among ldap / datafeed and syncsources tests but are not
strictly correctly located (notably syncsources tests behaviour of the native
source's check_config).
The system source url checking part which disappears from syncsources will be
reintroduced in a follow-up.
[MASTER]
load-plugins=cubicweb.pylintext
ignore=__pkginfo__
[MESSAGES CONTROL]
disable = too-many-ancestors,too-many-instance-attributes,too-many-public-methods,
too-few-public-methods,too-many-arguments,import-error
[BASIC]
function-rgx = [a-z_][a-z0-9_]{2,35}$
good-names=w,_
[TYPECHECK]
generated-members=debug,info,notice,warning,error,critical,exception
[CLASSES]
exclude-protected=_cw,_cnx,
# namedtuple public API.
_asdict,_fields,_replace,_source,_make
[FORMAT]
max-line-length=100
max-module-lines=2000