BLXVI-117 (8.38) Fixed regression with ScanDataProcessorResult
(8.38) Added getMeta method to metadata.py that gets metadata from the relevant source.
(8.38) Added setFilePrefix method to IncrementalFile to match the functionality offered by NexusDataWriter's SRS file functionality.
BLXVI-134 (8.38) - workaround for the fact that
AbstractContinousScanLine sets HardwareTriggering to false before
atScanEnd is called
Fixed TestScanDataProcessorResult to account for c107ad1f

See BLXVI-117 - commit c107ad1f (cherrpicked to 252c90b6).
TestScanDataPrcessorResult was not updated to account for changes made
to ScanDataProcessorResult.
Merge branch 'gda-8.42'
Fixed TestScanDataProcessorResult to account for c107ad1f

See BLXVI-117 - commit c107ad1f (cherrpicked to 252c90b6).
TestScanDataPrcessorResult was not updated to account for changes made
to ScanDataProcessorResult.
Merge branch 'gda-8.38'