[story] EQSANS can reduce local NeXus files

[glass-ships]

As an Instrument Scientist, I want to have the EQSANS reduction script to be able to reduce data from a local file saved outside of the data folder (the default folder where the measured data get saved directly).

=======================================================================

Parent	Children

Acceptance Criteria:

When the runNumber is specified as an int number OR a string of number (for example, runNumber = 12345 or runNumber = "12345"), then the reduction code will automatically find the associated data on the default place.

When the runNumber is specified as a nexus file path as a string then the reduction code will load that specific nexus file and reduce it. For example, runNumber = '/SNS/EQSANS/shared/IPTS-1111/shared/mydata/EQSANS_12345.nxs.h5'

This interpretation of runNumber should be applied to all places where the runNumbers are used as an input.

Description, Additional Detail, Context:

[glass-ships]

This issue was migrated from code.ornl.gov.