Merge pull request #1839 from mattyb149/dev

[PDI-10610]: Unifying properties-related interfaces
[PDI-10610] - Added getRootUri to IDocumentLocator. Added some javadoc,
Merge pull request #1852 from rfellows/metaversedev

[PDI-10610] - Added getRootUri to IDocumentLocator. Added some javadoc.
[PDI-10610]: Added get/setContext to IMetaverseComponentDescriptor