Harvesting refacturing

[sandrarum]

Added Todos, Comments. Removed Controlpanel Datagrid-View for Harvester. Moved old harvesting to harvesting_old.

[coveralls]

Pull Request Test Coverage Report for Build 144

• 36 of 47 (76.6%) changed or added relevant lines in 4 files are covered.
• 9 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+2.1%) to 62.926%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/pkan/dcatapde/harvesting/data_cleaner/interfaces.py	1	2	50.0%
src/pkan/dcatapde/browser/content_views/harvester.py	25	26	96.15%
src/pkan/dcatapde/harvesting/source_type/rdfttl.py	0	3	0.0%
src/pkan/dcatapde/api/harvester.py	10	16	62.5%

Files with Coverage Reduction	New Missed Lines	%
src/pkan/dcatapde/api/harvester.py	1	55.26%
src/pkan/dcatapde/vocabularies/dcat_field.py	1	57.14%
src/pkan/dcatapde/harvesting/field_adapter/interfaces.py	2	66.67%
src/pkan/dcatapde/config/views.py	5	58.33%

Totals
Change from base Build 132:	2.1%
Covered Lines:	2142
Relevant Lines:	3404

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💛 - Coveralls