Make itools compatible with MacOS

[mathbagu]

• Do you want to request a feature or report a bug? Bug

• What is the current behavior? The itools command doesn't work properly on MacOS because the -f of readlink doesn't exist (see manpage).

Currently, we get the bin directory in our linux scripts using installBinDir=$(dirname $(readlink -f $0)). The -f option of readlink doesn't exist on MacOS. This options aims to follow recursively the symbolic links. I think the main use-cases are:

• run itools from the directory where it's installed (./itools --help)
• run itools specifying its path (~/itools/bin/itools --help)
• run itools from the PATH (itools --help)

I think no user have a link to the itools itself. Eventually, a user could have a link to an intermediate folder:

itools-v3.7.0
itools-v3.8.0
latest -> itools-v3.8.0

In that case, the user could run itools using ~/itools/latest/bin/itools.

For these reasons, I propose to remove the -f option that should solve the issue.

• If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem Simply run itools on MacOS

• What is the expected behavior? Be able to use powsybl on MacOS

• What is the motivation / use case for changing the behavior?

• Please tell us about your environment:

  • PowSyBl Version: ...
  • OS Version: ...

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, spectrum, etc)

[mathbagu]

In the same time, I propose to fix also powsyblsh and the install.sh script (see #734)