blitz: Use MetadataRoot in MetadataStore implementations
OMEROMetadataStoreClient: getRoot uses OMEROMetadataStoreClientRoot
Merge commit '30c0eeb1ba58f08e1863cf472f79972c42885ac3' into merged-fs-fixes

Conflicts:
	components/blitz/src/ome/formats/OMEROMetadataStoreClient.java

Import errors (again)