Save calibration file for ENGIN-X (output from EnginXCalibrateFull)

[mantid-builder]

This issue was originally TRAC 11771

Original Reporter: @FedeMPouzols

This ticket is blocks : TRAC8368, TRAC11772

EnginXCalibrateFull presently produces a TableWorkspace with x-y-z values. At least we need to:

• add more columns in the output table to show L and 2\theta, \delta L and \delta 2\theta values.
• It may be also needed and/or convenient to save them in a different text format.

[FedeMPouzols]

From last meeting with Saurabh, it seems that it would be fine to have:
x-y-z value as is provided now + L2, 2\theta and \phi + delta L2.

Note that there's only one delta column, as L2 is the only value that changes.

[FedeMPouzols]

Also, for now we could add an option to save this information directly into an output text file (csv). Something like OutputPositionsFilename.

[FedeMPouzols]

As we just discussed with @Anders-Markvardsen, in addition to saving the calibration parameters in a table and a file, it would be very convenient to apply the calibration on the InputWorkspace instrument. That will be added in this issue (and explained in the EnginXCalibrateFull documentation).

[FedeMPouzols]

The addition described in the last comment would also close issue #12700.