Fix xmlreader allowed bool values

[cniethammer]

Description

This is part of the work for #255 addressing the checks for the shifted parameter in the input files.
The way this is fixed here is by making the xmlreader generally more strict in parsing boolean input values.

• Fix xmlreader to only accept true/false, yes/no or on/off as boolean values now

• Fix examples to use false and true as boolean values in xml input files where they failed to

• Fix unit tests to use false and true as boolean values in xml input files where they failed to

• Added the new DropletCoalescence example to list of standard inputs to be tested

• Tested running all examples in the "examples/example-list.txt" for 10 time steps

• Tested running internal unit tests

[HomesGH]

I think this is a good change since it improves the readibility of the config files. However, it will probably break a lot of configuration files of the users in the beginning.
In addition, also the "documentation" in the header files should be updated, e.g. here. Is this "documentation" in the header also parsed by Doxygen?

[cniethammer]

Thanks for the thorough review.

Yes, this might cause users to update their configuration files. However, no existing functionality is removed by these changes. Also, the user will get an error message and appropriate information on what to change in his configuration file.

Yes, Doxygen parses all source files as well as a few files in the doc directory for the generation of the documentation.
Concerning the documentation I updated the mentioned one as well as a few other places.

[HomesGH]

Alright, thank you. We could also search for something like >0< or >1< to get more locations where it should be changed, e.g. in the planar LRC.

[cniethammer]

I checked now the codebase with the following grep command for possible issues

grep -E -v '(Ixx|Iyy|Izz|start|stop|component|smooth|vx|vy|vz|<x>|<y>|<z>|framesperfile|<b>|<g>|<r>|currenttime|steps|refID|rebalanceLimit|ParticlesBufferSizeMPI|temperature|lcx|lcy|lcz|yPos|ymin|binindex|direction|yl|adios2step|left|init)'

This has one items left that is not covered with this PR:

• The 'adaptiveContainer' - this is fixed separately in Fix type of _adaptive and _periodic parameters in FMM to bool #288

I thereby consider this PR as complete

[HomesGH]

I checked now the codebase with the following grep command for possible issues

grep -E -v '(Ixx|Iyy|Izz|start|stop|component|smooth|vx|vy|vz|<x>|<y>|<z>|framesperfile|<b>|<g>|<r>|currenttime|steps|refID|rebalanceLimit|ParticlesBufferSizeMPI|temperature|lcx|lcy|lcz|yPos|ymin|binindex|direction|yl|adios2step|left|init)'

This has one items left that is not covered with this PR:

* The 'adaptiveContainer' - this is fixed separately in [Fix type of _adaptive parameter in FMM to bool #288](https://github.com/ls1mardyn/ls1-mardyn/pull/288)

I thereby consider this PR as complete

Very nice! 👍