add exception handling to the zipping of archived files

[coveralls]

Pull Request Test Coverage Report for Build 4144460615

• 0 of 11 (0.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.06%) to 64.315%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
daiquiri/query/tasks.py	0	11	0.0%
<!--	Total:	0	11	0.0%	-->

Totals
Change from base Build 4104281142:	-0.06%
Covered Lines:	4686
Relevant Lines:	7286

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💛 - Coveralls