aiidateam / aiida_core / 5074

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develop: 74%

Pull #2464

travis-ci

Ensure nested `calcfunctions` work as long `store_provenance=False`

In principle `calcfunctions` are not allowed to call other `calcfunctions`
because a calculation is not allowed to call other calculations.
However, `calcfunctions` can be called as normal functions by setting
the metadata variable `store_provenance` to `False`. Therefore, as long
as `store_provenance` is turned off for nested functions, a
`calcfunction` is allowed to call other `calcfunctions`.

To make this work, the `Process._setup_db_record` method had to be
adapted to only add a call link to the parent process, if and only if
`store_provenance` for the child node is enabled. Otherwise, the link
validation would fail since a `CALL` link outgoing of a
`CalculationNode` is forbidden.

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