LoadISISNexus is broken when monitors are defined in the middle of the detectors

[martyngigg]

This issue was originally TRAC 4732

The INES instrument at ISIS have 164 spectra with the monitors defines as 145-148. LoadISISNexus assumes that monitors occur in blocks at the start or end of the detector list and so loads the data incorrectly. Any of the INS nxs files will show this problem

[martyngigg]

@NickDraper (2012-04-30T14:12:58):
Moved at end of release 2.1

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@NickDraper (2012-08-10T12:43:39):
Moved at the end of release 2.2

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@NickDraper (2012-10-28T11:38:50):
Moved to milestone 2.4

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@NickDraper (2013-04-29T09:49:39):
Moved to r2.6 at the end of r2.5

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@martyngigg (2013-07-15T08:46:44):
Batch move to 2.7

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@NickDraper (2014-02-14T11:04:56):
Bulk move to assigned at the introduction of the triage step

[martyngigg]

This is now duplicated by #15482.