Fix no id in dimension content repository

[alexander-schranz]

If the content rich entity uses uuid instead of id the query should still work.

[coveralls]

Pull Request Test Coverage Report for Build 1337066520

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 1332980086:	0.0%
Covered Lines:	2003
Relevant Lines:	2003

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💛 - Coveralls