This new method helps to free storage space of a Wendelin instance
in case 'DataArray.setArray(None)' has been called before.

Previously assigned ZBigArrays are orphaned (no longer related
to any other object). In order to free some storage space, we can
therefore remove them from the database by explicitly garbage
collecting them.

This helps to save storage space when the refresh workflow is called [1].

[1] https://lab.nexedi.com/nexedi/wendelin/blob/04787344/bt5/erp5_wendelin/SkinTemplateItem/portal_skins/erp5_wendelin/ERP5Site_executeDataAnalysisList.py#L32-37

With the new extension method 'Base_deleteZBigArray' we can garbage
collect individual ZBigArray.

Needed after 85b18536
(uses old XML format which breaks codign styles tests)

See merge request !158

levin: This cherry-picks the latest version of the
'DataAnalysis_clearAndReprocessFromScratch' script from a customer
project. It's needed to successfully run the 'refresh' workflow [1]
and was perhaps forgotten to be added in !31.

[1] https://lab.nexedi.com/nexedi/wendelin/blob/04787344/bt5/erp5_wendelin/SkinTemplateItem/portal_skins/erp5_wendelin/ERP5Site_executeDataAnalysisList.py#L37

Fix.

context) have this format.

sensor.product

Thus be consistent also here for Data Streams' reference.

(https://wendelin.nexedi.com/wendelin-HowTo.Create.Notebook.with.Plotly.Chart.Editor/wendelin-Poltly.Chart.Editor.4?format=)

See merge request nexedi/wendelin!159

See merge request !157

- The business template is used to process drone log data and give a score to each simulated drone flight. The best five drone flights and their parameters are displayed in a notebook.

- Added ingestion policy in the erp5_wendelin_drone business template for Data Bucket Streams.

- Added a notebook for visualization of data with a short description of the project.

- Added tests for this business template, which can be used to dynamically generate new data (mock data).

See merge request !156

See merge request nexedi/wendelin!153

See merge request nexedi/wendelin!152

This reverts commit e6f7b0097f7c27109fd61c1692c3588b625bd90e.

See merge request nexedi/wendelin!151

This reverts commit e6f7b0097f7c27109fd61c1692c3588b625bd90e.