[dataimport] remove commit_at_flush parameter from MassiveObjectStore
WARNING: the default value was True, but flush() now never commits.
\.svn
^build$
^dist$
\.egg-info$
^.tox$
\.pyc$
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\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$
\.old$
syntax: regexp
.*/data.*/database/.*\.sqlite
.*/data.*/database/.*\.config
.*/data/database/tmpdb.*
.*/data/ldapdb/.*
.*/data/uicache/
.*/data/cubes/.*/i18n/.*\.po
^doc/html/
^doc/doctrees/
^doc/book/en/devweb/js_api/
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