Docker: No extra RUN command for installing Net::DNS and Gazelle

[bschmalhofer]

In otobo.web.dockerfile there are the following TODO comments:

# The modules Net::DNS and Gazelle take a long time to build and test.
# Install them early in a separate RUN in order to make rebuilds faster.
# TODO: go back to install via the cpanfile
#
# Found no easy way to install with --force in the cpanfile. Therefore install
# the modules with ignorable test failures with the option --force.
# TODO: go back to install via the cpanfile

Now that Carton is used for module installation, let's investigate whether these special cases are still needed. If they still make sense, then remove the TODO.

[bschmalhofer]

Removed the explicit calls of cpanm. Build seems to be a little bit faster, as carton skips the tests. Github actions are still working. Closing this issue.

[bschmalhofer]

Reopening because there are missing modules in rel-10_1.

There is a bit of confusion about how modules are declared in bin/otobo.CheckModules.pl. The current convention is that a module declaration needs exactly one of the attributes 'Required' or 'Features'. The hashes %IsStandardFeature and %IsDockerFeature then determine the specific behaviors under the various command line options.