[datafeed] attempt to acquire synchronization lock even when force is given
instead of the implementation in e717da3dc164, raise an error if the lock is
already grabbed and catch this error in the caller.
See discussion on https://www.cubicweb.org/revision/10790765
Closes #10451635
include README
include COPYING
include COPYING.LESSER
include pylintrc
include bin/cubicweb-*
include man/cubicweb-ctl.1
include doc/*.rst
include doc/Makefile
recursive-include doc/book *
recursive-include doc/tools *.py
recursive-include doc/tutorials *.rst *.py
include doc/api/*.rst
recursive-include doc/_themes *
recursive-include doc/_static *
include doc/_templates/*.html
include doc/changes/*.rst
recursive-include doc/dev .txt *.rst
recursive-include doc/images *.png *.svg
include doc/conf.py
recursive-include cubicweb/misc *.py *.png *.display
include cubicweb/web/views/*.pt
recursive-include cubicweb/web/data external_resources *.js *.css *.py *.png *.gif *.ico *.ttf *.svg *.woff *.eot
recursive-include cubicweb/web/wdoc *.rst *.png *.xml ChangeLog*
recursive-include cubicweb/devtools/data *.js *.css *.sh
recursive-include cubicweb/i18n *.pot *.po
recursive-include cubicweb/schemas *.py *.sql
recursive-include cubicweb/test/data bootstrap_cubes *.py *.sql
recursive-include cubicweb/entities/test/data bootstrap_cubes *.py
recursive-include cubicweb/sobjects/test/data bootstrap_cubes *.py
recursive-include cubicweb/hooks/test/data bootstrap_cubes *.py
recursive-include cubicweb/server/test/data bootstrap_cubes *.py source* *.conf.in *.ldif
recursive-include cubicweb/devtools/test/data bootstrap_cubes *.py *.txt *.js *.po.ref
recursive-include cubicweb/web/test/data bootstrap_cubes pouet.css *.py
recursive-include cubicweb/etwist/test/data *.py
recursive-include cubicweb/web/test/jstests *.js *.html *.css *.json
recursive-include cubicweb/web/test/windmill *.py
recursive-include cubicweb/skeleton *.py *.css *.js *.po compat *.in *.tmpl rules
prune doc/book/en/.static
prune doc/book/fr/.static
prune doc/html/_sources/
prune cubicweb/misc/cwfs
prune doc/js_api
global-exclude *.pyc