New logic disallows coexistence of slave and software instance with same title.

Also rename expected exception.

Use correct method to request destruction.
Use slap tool to inform about destruction.

It is hard to remove elements from sequence, and get will return value of
available key, but resetting sets to '', so fallback again to started state.

Previous steps can set state to unexpected value.

First open order line is create immediately with dates.

The DeliverSubscriptionSalePackingListAlarm is globally delivering all
subscription packing lists. So previously the test was not reaching the point
(because of indexation and random activity execution).

Force alarm call and update assertion.

Some tools (like workflow tool) are not working correctly on object wrapped in
ZSQL result.

Keep compatibility with current slapgrid by invaliding Software Instance only
when it is reported as destroyed.

Note: This will be error prone. Maybe ETag shall be used in this case to
reflect changes of API.

Bye bye typo.

SlapOS master does not decide anymore if the client has to run buildout or not.
This has to be done on client side.

Use information filled in request to find newly created documents.

Fix slave partition request and return correct informations.