HDX-10209 add IOM image & move partners to constants

[coveralls]

Pull Request Test Coverage Report for Build #5719

Details

• 2 of 4 (50.0%) changed or added relevant lines in 3 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.003%) to 73.523%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
ckanext-hdx_theme/ckanext/hdx_theme/views/landing_pages.py	0	2	0.0%
<!--	Total:	2	4	50.0%	-->

Files with Coverage Reduction	New Missed Lines	%
ckanext-hdx_theme/ckanext/hdx_theme/views/landing_pages.py	2	58.33%
<!--	Total:	2		-->

Totals
Change from base Build #5709:	0.003%
Covered Lines:	11860
Relevant Lines:	16131

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💛 - Coveralls