registrymodifications.xcu has been moved to the solver ( unittest/user/data )
new OOO_CONFIG_REGISTRY_EXTRA_DIR env var will be used to specify the directory 'data' will be contained in so we can override various config items.
this should make it easier to deal with the increased complexity in the
unit tests for vba and star basic
we should not mess with the normal calc tests while working on advanced
vba and basic tests