Add more regression tests such that there is at least one test per plugin

[xforever1313]

We need to make sure that we pack all the required DLLs with each plugin when making an install package. The quickest way to make sure of this is to have at least one regression test for each plugin.

We will also need to make a separate test environment for each plugin. This way we can guarantee that plugins are self-sustaining, and not grabbing dlls from elsewhere.

[xforever1313]

Every Plugin has at least 1 test (PluginLoadTest). I believe we can close this issue.