Fix component-is-attached-to-system check #1080
Merged
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Fixes #1016. The check for whether a component is attached to a system was inadequate. It checked whether a component of the given type and name was attached to the system. If you built two systems with the same components and names, that check would incorrectly pass. This PR fixes that bug.
There were numerous tests that only passed because of this same-type-and-name comparison. This PR also fixes those tests.