Fix shellcheck lint errors in cluster/kubemark/util.sh

cluster/kubemark/util.sh

@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
-source ${KUBE_ROOT}/test/kubemark/cloud-provider-config.sh
-source ${KUBE_ROOT}/cluster/${CLOUD_PROVIDER}/util.sh
-source ${KUBE_ROOT}/cluster/kubemark/${CLOUD_PROVIDER}/config-default.sh
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/../..
+source "${KUBE_ROOT}/test/kubemark/cloud-provider-config.sh"
+source "${KUBE_ROOT}/cluster/${CLOUD_PROVIDER}/util.sh"
+source "${KUBE_ROOT}/cluster/kubemark/${CLOUD_PROVIDER}/config-default.sh"

hack/.shellcheck_failures

@@ -19,7 +19,6 @@
 ./cluster/gce/upgrade.sh
 ./cluster/gce/util.sh
 ./cluster/images/conformance/run_e2e.sh
-./cluster/kubemark/util.sh
 ./cluster/log-dump/log-dump.sh
 ./cluster/pre-existing/util.sh
 ./cluster/restore-from-backup.sh