Adds passing of objects to transmission reader

[domna]

This adds the functionality of passing a dict to the transmission readers convert function.

@hampusnasstrom

[sherjeelshabih]

So you pass Dict type objects and append them to the template? No other object types are accepted currently, right?

[coveralls]

Pull Request Test Coverage Report for Build 6160085524

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 10 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.02%) to 51.07%

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Files with Coverage Reduction	New Missed Lines	%
pynxtools/dataconverter/readers/rii_database/reader.py	2	94.44%
pynxtools/dataconverter/readers/utils.py	8	90.24%

Totals
Change from base Build 6086304081:	-0.02%
Covered Lines:	5990
Relevant Lines:	11729

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💛 - Coveralls

[domna]

So you pass Dict type objects and append them to the template? No other object types are accepted currently, right?

Exactly, I expect an iterable of dicts. Every other element is simply warned about and ignored