Changed SCLTypeUtils to not log warnings for non-property relations

Changed SCLTypeUtils to not log warnings for non-property relations

For example procedural UCs and their substructure requests would report
tons of these all the time, which is worthless.

Also added an SCL type for MOD.ChangeInformation to avoid having to see
warnings about the SCL type of MOD.ChangeInformation not being
available:

```
WARN  [...] org.simantics.modeling.SCLTypeUtils: SCLTypeUtils.getType
cannot transform data type '{
    createdBy : String,
    createdAt : Long,
    modifiedBy : String,
    modifiedAt : Long
}' to type. Returns a as default.
```

gitlab #546

Change-Id: I30210fb3055a4d844fe6e9b07c64490a45c14ecd