[cern] Fix KUBE_API_ARGS
After 42d35211 KUBE_API_ARGS are set only to "--runtime-config=api/all=true" append this param at the end of the others.
Change-Id: Id6995b16326b7094705a7cc118de66d5081cfc5d Signed-off-by: Spyros Trigazis spyridon.trigazis@cern.ch
Closes OS-6871