ENGIN-X: define what exact .par file to produce from EnginXCalibrate

[mantid-builder]

This issue was originally TRAC 11773

Original Reporter: @FedeMPouzols

This ticket is blocks : TRAC8368, TRAC11772

Define what needs to go into the output .par file that GSAS can load.

Very minimum information that will go into these files is: Difc and Zero outputs from EnginXCalibrate.

This may involve extensions to EnginXCalibrate.

Also, clarify if more information is needed in addition to DetectorPositions.

[FedeMPouzols]

The most important info that is required for these files, in addition to the difc and zero parameters, are the profiles which go in lines like:
INS 1PRCF11 1.163000 -0.126000 0.063000 0.000000E+00
These are produced by GSAS.

Also: here we should generate .prm files that include both banks.

[FedeMPouzols]

Traditionally a couple of files have been used, one for each EnginX bank. But the idea is to put both in the same .prm/.par file (template).