BATS: k8s/helm-install-rancher: Disable ramdisk

This test needs a lot of RAM (to run Rancher Manager); disable ramdisk
to avoid hitting swap.

Signed-off-by: Mark Yen <[email protected]>

Author: mook-as

bats/tests/k8s/helm-install-rancher.bats

@@ -1,7 +1,10 @@
 # Test case 11 & 12
 
 load '../helpers/load'
-RD_FILE_RAMDISK_SIZE=12 # We need more disk to run the Rancher image.
+
+local_setup_file() {
+    RD_USE_RAMDISK=false
+}
 
 local_setup() {
     needs_port 443