Maintaining several versions of the same file in different folders
is a bad idea, because at some point their content gets out of sync.
This is exactly what happened to 'respawn.sh': sleep()ing was only
implemented in 'osmo-bts-master/respawn.sh', other versions of this
file would simply ignore '$SLEEP_BEFORE_RESPAWN'.
The easiest solution would be to have all common files in a single
directory, however Docker does not allow to ADD files from outside
of the build context. In other words, all files must be in the
same directory as the Dockerfile itself.
Modify 'make/Makefile' in order to copy the contents of common
directory to the current build context ('pre-build' target) and
remove it after building ('post-build' target).
Change-Id: I3ec86c8610b3b43d39ea8e3da444861d317ced4e
Make it possible to run ttcn3-ggsn-test against osmo-ggsn with the GTP
kernel module. This feature is enabled by environment variables
explained in ttcn3-ggsn-test/jenkins.sh, and can either use the
pre-built kernel from Debian, or build a kernel from source.
The kernel runs inside QEMU inside the usual osmo-ggsn-master docker
image.
Thanks to Pau for providing the kernel config and kernel-test scripts
that this patch is based on! I ended up modifying them quite a bit to
fit the docker use case, and to build the initrd (so we can use the
stock debian kernel).
Related: OS#3208
Change-Id: I54e752048eed2a170a1cf4e0fd410de255b9de5d