Optionally add image_scales and image_field in Summary serializer.

[mamico]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 6782321440

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• 35 of 40 (87.5%) changed or added relevant lines in 7 files are covered.
• No unchanged relevant lines lost coverage.
• Overall first build on image_scales_in_summary at 74.842%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/design/plone/contenttypes/restapi/serializers/modulo.py	1	2	50.0%
src/design/plone/contenttypes/restapi/serializers/punto_di_contatto.py	1	2	50.0%
src/design/plone/contenttypes/restapi/serializers/summary.py	25	28	89.29%

Totals
Change from base Build 6782304980:	74.8%
Covered Lines:	3088
Relevant Lines:	4126

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💛 - Coveralls