Load doesn't work for preNexus files

[Russell Taylor]

It chooses LoadEventPreNexus alright, but the error when it tries to run is:

Load started
Property "EVENTFILENAME" is not set to a valid value: "No file specified.".
Property "EVENTFILENAME" is not set to a valid value: "No file specified.".
Error in execution of algorithm Load:
Some invalid Properties found

It's losing the fact that the property is not called 'Filename' in this case.

[Russell Taylor]

Re #8159. Add CNCS prenexus file.

There are no prenexus files in this repo at the moment. Adding this will mean that the LoadLotsOfFiles test will pick it up - and will fail until I fix the issue in Mantid.

Changeset: b95f7b0233bdbea78cd51b7cfaf1d51c75b644b0

[Russell Taylor]

Re #8159. Make sure the filename property's name is set correctly.

In the case of LoadEventPreNexus is is "EventFilename". It seems that for everything else is is "Filename" because the variable that holds this is empty by the time the algorithm comes to run (though the loader is selected correctly). I've factored out the method that sets the variable and called it again from within a method that exec() calls.

Changeset: b289687e0acc25bd096df0df1fa4f273deee1cdd

[Russell Taylor]

Tester: The branch is bugfix/8159_fix_load_for_prenexus in both the mantid and systemtest repos

To test - try to use Load to load a prenexus (*_neutron_event.dat). It should now work. A file of this type was added to the systemtests repo so that the LoadLotsOfFiles test will attempt to use Load on it. Previously, there were none in that repo so Load was entirely untested for this type of file.

[Peter Peterson]

Merge remote branch 'origin/bugfix/8159_fix_load_for_prenexus'

Full changeset: ​b9c99c33781cf71bee2ee3b62169e079efb8fb2d

[Peter Peterson]

Merge remote branch 'origin/bugfix/8159_fix_load_for_prenexus'

Full changeset: ​262ba31bfb2d1862eef3e0a7e59e732c07e3d00e

[Stuart Campbell]

This ticket has been transferred to github issue ​9004