PluginStateTestRestoration should provide failure detail

[sudara]

I have a plugin that is intermittently failing the PluginStateTestRestoration test.

The error I get is:

Starting tests in: pluginval / Plugin state restoration...
!!! Test 1 failed: Parameters not restored on setStateInformation -- Expected value  within 0.1 of: 134.472, Actual value: 193.868

I have 400+ parameters — it would be nice if pluginval could identify the misbehaving params or at least output the expected vs. actual parameter list.

[drowaudio]

Fixed here: #101

[sudara]

Yay!