[DCAEGEN2] Added imagePullSecret to cleanup job

Added the imagePullSecret in the job to enable private registries with
credential access

Issue-ID: OOM-2869
Signed-off-by: Andreas Geissler <andreas-geissler@telekom.de>
Change-Id: I00f2166dee740a226f30e51b81b5e8e7f8396d04
1 file changed