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Fixes instances with missing assignment operator or copy constructor.
These are dangerous cases with dynamic memory as it's not obvious what
will happen, but the compiler will try anyway.

In many cases we can simply switch to unique_ptr or disable the copy
when it makes sense. But one or two cases required additional thought.

This fixes several memory leaks or sources of corruption if the fields
fall out of sync

Modernises the codebase from nested workspaces to modern form. E.g.:

namespace A{
namespace B {}
}

Becomes
namespace A::B{
}

This will allow us to specify in the coding standards to prefer the
simple form instead

Also updated class_maker.py

re #27319

Update copyright headers in all files

Squashed commit of the following:

* First version of a script to manage copyright statements

re #23468

* Neatened up script, added comments

re #23488

* move script to tools directory

re #23488

* small script changes and a couple of manual file changes

re #23488

* Minor chnage to whitespace detection in regex

re #23488

* Add an excluded directory

re #23488

* remove a repeasted copyright statement in a file

re #23488

* Don't comsume the comment end if it is on the same line

re #23488

* fix error in new copright parsing

re #23488

* remove double copyrifght entry

re #23488

* Improve handling of old copyrights at the start of comments

re #23488

* remove empty comments re #23488

* exclude gsoapgenerated directories

re #23488

* Sort out greedy line matching re #23488

* improve empty comment removal

re #23488

* improv...

Update to clang-format-5 and reformat the codebase 

Signed-off-by: David Mannicke <davidm@ansto.gov.au>

Signed-off-by: David Mannicke <davidm@ansto.gov.au>

Signed-off-by: Anton Piccardo-Selg <anton.piccardo-selg@tessella.com>