iCurrently we install inetutils-ping in some docker images and
iputils-ping in others; let's make it more uniform to avoid running
different implementations in different images.
The iputils-ping provides further linux-specific features, such as the
"-I interface" param, which is used by some images, so let's pick that
one everywhere.
Change-Id: If11a1c2ae1115b585b6a44a45e9569c16856d8c4
This Dockerfile allows building a given repo and branch of
titan.core.git which can then be used by any ttcn-*-test/ environment by
simply changing its Dockerfile "FROM" line from
$REGISTRY/$USER/debian-bullseye-titan to
$REGISTRY/$USER/debian-bullseye-titan-mater.
This is useful to debug or develop titan.core or test whether a given
testsuite works fine with a newer version of titan.core.
Change-Id: I19ee98a319ccad167d06c4f183fe80ecac909483