IndirectEnergyConversion createMapping and default output directory

[Gesner Passos]

When testing #6826 I found that the script fails if your outputdirectory does not contains a final slash. Mine was set to /tmp

The exception was:

IOError: [Errno 13] Permission denied: '/tmpgrouping.dat'
  at line 16 in ''
  caused by line 40 in 'Code/Mantid/scripts/Inelastic/IndirectEnergyConversion.py'

If you change the default save directory (properties) to /tmp/, than it does not fail.

[Nick Draper]

Moved to r2.6 at the end of r2.5

[Martyn Gigg]

Batch move to 2.7

[Samuel Jackson]

Refs #6831 concatenated path using os.path.join instead.

Changeset: 04421692f116a53dd7fda27635aef3d2079eb70e

[Samuel Jackson]

To Tester

I used the following script from #6926 to verify I could reproduce the error after setting my default save directory to temp.

import mantid
mantid.config["default.facility"]="ISIS"

filename="IRS21360.nxs"

import inelastic_indirect_reducer as iir
reducer = iir.IndirectReducer()
reducer.set_instrument_name("IRIS")
reducer.set_detector_range(2,52)
reducer.set_parameter_file("IRIS_graphite_002_Parameters.xml")
reducer.append_data_file(filename)

import IndirectEnergyConversion as ind
group_file = "grouping.dat"
mapfile = ind.createMappingFile(group_file, ngroup=10, 
                                nspec=((53-3+1)/10), first=3)
reducer.set_grouping_policy(mapfile)
reducer.reduce()

Check that you can reproduce the error without the fix. Then run the script again with the fix and check that the bug is gone.

[Jay Rainey]

Merge remote-tracking branch 'origin/bugfix/6831_Indirect_C2E_createMapping_bug'

[Jay Rainey]

The error no longer occurs if output directory does not have a trailing backslash.

[Stuart Campbell]

This ticket has been transferred to github issue ​7677