Add two new bt5s and re-create the default configuration used for wendelin in both Scalability and Deployment tests.

By default enable automatic approval of credential requests if Wendelin's data lake bt5 is installed.
Add also proper warning accordingly.

Be explicit rather than implicit (not speifying argument lead to wrong argument being assigned and error in code).

See merge request !39

No need to check if no activities left as any left innocently failing activity can mark site as not installed. Fix skin layer and remove Guards so ERP5Site_isReady script can be use from anonymous user (this is fine as long as we use this bt5 ONLY for automated testing).

Run alarm every 30 minutes so enough time to finish previous run. Better check list of installed bt5.

Add a default business template that can automatically setup a Wendelin instance without users' input. This bt5 should be used for automated testing ONLY.

(Test speed becomes network dependant rather than storage evaluated). Thus use initial default for now.

Revert "Increase from 1MB to 10MB upload file size."

This reverts commit 42d6afa4.

Revert "(Test speed becomes network dependant rather than storage evaluated). Thus use initial default for now."

This reverts commit 703c4c7a.

(Test speed becomes network dependant rather than storage evaluated). Thus use initial default for now.
Revert "Add default wendelin cluster configuration which is to be used on a Test Suite."

This reverts commit bb47a80d.

Tests passing locally thus safe to merge/

/reviewed-on nexedi/wendelin!37