Avoid/catch problems setting up a StructureBlockRegistry

[kirderf1]

Fixes a problem that @akisephila encountered. When an exception is thrown in ILandType.registerBlocks(), the error ended up not being logged, thus making it harder to find the actual problem. This PR fixes this issue in two ways:

• Uses by TitleLandType.isAspectCompatible() have been replaced by terrain land type tags.
• When the structure block registry is set up for LandGenSettings, any exceptions are now caught and logged.

[Dweblenod]

I am unsure how to really bug test this, but I can give my approval now for the general contents

[kirderf1]

If one really want to test this, you could try out TitleLandType.isAspectCompatible() by predefining land types, and creating a land/loading a save file with a land to test the LandGenSettings part. One could try it as-is to see that everything works fine normally, and one could purposefully make a land throw an exception in landType.registerBlocks() and see that the exception is handled properly.

[Dweblenod]

Using /sburbpredefine, it does correctly prevent a disallowed land type combo from being used, however it does not give a warning and automatically reassigns the offending land type