If a Rule Engine fails, results from other engines should still be returned

In *TemplateAnalyzer.cs*, running both `JsonRuleEngine` and `PowerShellRuleEngine` are done within the same `try` block. If one of them throws an exception, a wrapper exception is then thrown, and potential results from another engine are lost.

If both are tried separately, the exceptions can be caught to process later. But there should be thought put into what to do with the exceptions, so results can be available **and** the exception can be surfaced to the user.