[tests/cocom] Add test for get_identities

[VSevagen]

Test was missing for get_identities function in cocom.py This commit adds the test to check for return value for every item.

Signed-off-by: sevagenv [email protected]

[coveralls]

Pull Request Test Coverage Report for Build 752768718

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.04%) to 82.3%

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Totals
Change from base Build 725267991:	0.04%
Covered Lines:	8616
Relevant Lines:	10469

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💛 - Coveralls