There is no preprocessing required now.

...to reflect recent changes in ews-source-calc commit e162c48.

... to reflect latest changes in ews-advisory-builder.

...to reflect latest changes in underlying package ews-advisory-builder.

This change introduces a semi-colon into one of the free-form survey
entries, which should be handled by the source calculation. For the
survey integration test to pass, it is necessary to use the
corresponding commit to ews-source-calculation.

This is done with a set of <date_valid_from>: <host_file.tif> pairs in
the run configuration under ['Epidemiology']['Host']['HostRasters'].
This is an optional argument. The 'HostRaster' argument in the
configuration is still needed, but is renamed as 'TargetRaster' to
avoid confusion.

Cocnurrent changes were made in epi model.

This may one day be replaced by some 'host preprocessing' type
of EWS component.

Aspects to improve:

*  Currently, the dynamic host map has to be handled both in
ews-epidmiology for run time, and here for post-run in order
to convert units. It might be neater to do once in one place only
 by moving the unit conversion functionality into the epi model.

 * Implement testing for handling of dynamic host data.

changing the landpoint files to use a new column "included", to filter for countries, rather than using the lat lon values to decide what to filter

The model outputs were clipped to a smaller extent but the host map was
not. Because the epi model run grid is set by the host map, there is a big
time-saving by moving to a clipped host map. The epi partial integration
test passed on my machine, so now to check it passes in gitlab CI
pipeline.

changing the example landpoint files to be sorted lon,lat as the sort order gets enforced by the landpoint filter functions in postprocessing now.