LabelScanStore files are included when copying store

The store files of the active label scan store is included in the files
streamed from NeoStoreXaDataSource#listStoreFiles() so that the full label
scan store is included in a full database copy.

co-author: Tobias Lindaaker, @thobe
Merge pull request #1143 from tinwelint/2.0-label-scan-store--ha

LabelScanStore files are included when copying store