Move over deprecated soc-targets field

[Flix6x]

Fixes the following bugs:

• test_trigger_and_get_schedule was not checking for soc-targets sent in the deprecated soc-targets field
• test_trigger_and_get_schedule was not taking into account efficiency losses when checking soc-targets
• test_trigger_and_get_schedule was not checking for soc-targets sent within the flex-model field
• test_trigger_and_get_schedule was assuming wrong units for the soc-max and soc-targets fields, thereby creating an unsolvable scheduling problem
• The deprecated soc-targets field was hidden in an unused **kwargs variable, and not moved over to become part of the flex-model field
• The deprecated soc-targets field was still being deserialized by the API endpoint rather than by the scheduler
• The SoC state was stored with the wrong units as an asset attribute

[Flix6x]

Given the number of bugs, perhaps we should mention this PR in the changelog (together with #511 and #537)?

[coveralls]

Pull Request Test Coverage Report for Build 3805594227

• 4 of 5 (80.0%) changed or added relevant lines in 2 files are covered.
• 3 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.04%) to 65.54%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
flexmeasures/data/models/planning/storage.py	3	4	75.0%

Files with Coverage Reduction	New Missed Lines	%
flexmeasures/data/models/planning/storage.py	1	89.19%
flexmeasures/data/models/planning/utils.py	2	80.99%

Totals
Change from base Build 3801856437:	-0.04%
Covered Lines:	6838
Relevant Lines:	9802

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💛 - Coveralls

[nhoening]

Given the number of bugs, perhaps we should mention this PR in the changelog (together with #511 and #537)?

yes

[nhoening]

Thank for catching these!!