Removing CI_CONTEXT environment variable as it is really easy to sort

out if we are using systemd or not. We just need to check
/proc/1/cmdline to get the command that started the container.
Now to chose between systemd and no systemd we just need to set
`command` key in the pod yaml definition for nosystemd or remove the
line to use systemd.
Much more straightforward...

continuousintegration/docker/ctafrontend/cc7/opt/run/bin/ctafrontend.sh

@@ -39,8 +39,8 @@ echo OK
 echo "Generating core file in /var/log/cta directory so that those are available as artifacts"
 echo '/var/log/cta/core_%e.%p' > /proc/sys/kernel/core_pattern
 
-if [ "-${CI_CONTEXT}-" == '-nosystemd-' ]; then
-  # systemd is not available
+if [ "-$(cat /proc/1/cmdline 2>&1 | sed -e 's/\x0//g')-" != '-/usr/sbin/init-' ]; then
+  # we are not running in systemd
   runuser --shell='/bin/bash' --session-command='cd ~cta; xrootd -l /var/log/cta-frontend-xrootd.log -k fifo -n cta -c /etc/cta/cta-frontend-xrootd.conf -I v4' cta
   echo "ctafrontend died"
   echo "analysing core file if any"

continuousintegration/orchestration/pod-ctafrontend.yaml

@@ -33,8 +33,6 @@ spec:
           key: subdir
     - name: TERM
       value: "xterm"
-    - name: CI_CONTEXT
-      value: "nosystemd"
     command: ['/opt/run/bin/ctafrontend.sh']
     args: ["none"]
     volumeMounts: