ossec-hids can work as server,agent,local config.
Each one wants different build options, but have something
in common (like the init). So this becomes a dependency of
the various different types of ossec-hids.

* Explicitly depend on python2
* Enable tests

This reverts commit d10dacfd.

telepathy-logger is still required for polari.

destdir is changed to DESTDIR upstream for 'make install'

fixes #11392