[datafeed] Complete the import log even if parser could not be found It happens that if the parser could not be found, _pull_data() would just return an empty dict without taking care to close the import log which it just opened. This leads to misleading information in the user interface where CWDataImport entities kept accumulating in the "imports" tab of CWSource primary view without anything else happening. So: * log an error message when parser cannot be found * always close (write logs and set "end_timestamp" attribute) import log when leaving _pull_data(). Closes #15505460.

[twconfig] Set default value for "interface" to 0.0.0.0 This value means "all IP addresses on this host", which seems to fit with "default to everywhere" that's documented. Closes #15135610.

[session] Allow self._open to be False in __enter__ I do not understand why this assertion was there in the first place. And currently, it makes running any migration impossible. Hopefully, someone may be able to explain. See also commit b48020a80dc3 which mentions this assertion and suggests to remove it.

[pkg] Warn about "develop" command not installing legacy cubes directory Not sure we can do better than a warning, which is better than nothing anyways. Closes #15785635.

[pkg] Cleanup MANIFEST.in from non-matching entries This cleans up output of setup.py executions.

[devtools] make i18ncube customizable in a cube closes #15613724