AKVSQLRotation - Index out of bound exception

> Please provide us with the following information:
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### This issue is for a: (mark with an `x`)
AKVSQLRotation not working as expected
- [x] bug report -> please search issues before submitting
- [ ] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
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### Minimal steps to reproduce
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### Any log messages given by the failure
Executed 'AKVSQLRotation' (Failed, Id=07b6219a-dd7d-4c0c-a5ca-cf8531362266, Duration=1704ms)
Error - Index was outside the bounds of the array.

### Expected/desired behavior
>it should rotate sql password secret

### OS and Version?
> Windows 7, 8 or 10. Linux (which distribution). macOS (Yosemite? El Capitan? Sierra?)

### Versions
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### Mention any other details that might be useful

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