Empty ssh_options led to ssh login failure, which stopped the whole
script.
Change-Id: I8374a30a02b14d04eb0f623a0c58d7ebed77a589
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
(cherry picked from commit 
77c7d358bc6a61e2a5c24c6056cc3e40561f27c7)
 
 # Look for a compute node, that is online, and check if it is aarch64
 if [ "${INSTALLER_TYPE}" == 'fuel' ]; then
+    ssh_options="-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no"
     COMPUTE_ARCH=$(ssh -l ubuntu ${INSTALLER_IP} -i ${SSH_KEY} ${ssh_options} \
         "sudo salt 'cmp*' grains.get cpuarch --out yaml | awk '{print \$2; exit}'")
     if [ "${COMPUTE_ARCH}" == 'aarch64' ]; then