Update to clang-format-5 and reformat the codebase 

This is code duplicated in GroupDetectors and ReflectometryReductionOne2.

Re #22315

re #15164

and tackle unsused parameters, and enable to string shortning
re #15164

and make use in history and logging

re #15164

re #15164

The extractToEOL Kernal namespace method has been moved to the Kernal::Strings namespace where it makes more sense to be alongside other string and ascii stream methods

The change was made because of the difficulties i was having with the binary files stream provided by the FileDescriptor.

This is quite a useful one, as I've seen at least 3 different implementations
of that. Rigorous tests for it were added as well.

Refs #7772

Before making real code changes.

The ADS can set a string of characters each of which is not allowed to
be present within a workspace name. The current value is an empty string
and this will have some kind of default setting in the nearer future.

Refs #3669: Refactored LoadInstrument by moving the parsing code to Geometry/InstrumentDefinitionParser. This allowed ExperimentInfo to use it to load the instrument directly.

A routine, which transforms a path into vector of strings 

Refs #3157 Sort our System.h. It was becoming a dumping ground. It should only be touched when absolutely necessary as it affects every file in Mantid. Also combined this with Refs #2345 to sort out DLLExport/DLLImport usage. It's done for Kernel, Geometry and API but stuff in the plugins could do with updating as well.