Fixed unit tests for RunningStatistics and ThresholdedRunningStatistics (fixes #307)
Fixed unit tests for running statistics and thresholded running statistics:
- Thresholded values in thresholded running statistics are set to 0 and included in the running view.
- For any masked input data the masking willm be strict, i.e. the whole grid-cell will be masked.
- If there are any masked values on the edges from previous/following fuse period the grid-cell will be masked.
- The first and last years edges are padded with NaN values and are not included in the fuse computation.