gk-deploy: fix failure to run in testsuite
gk-deploy: fix failure to run in testsuite

regression introduced by the patch to make
gk-deploy runnable everywhere...
Can't use realpath in the travis CI test env.

Signed-off-by: Michael Adam <dcf2bf3ff8ea93047d51252815aac9756207ea09@redhat.com>

gluster/gluster-kubernetes,gluster/gluster-kubernetes