${status} ${message}= Run Keyword And Ignore Error Variable Should Exist ${privatekey}
Run Keyword If "${status}" == "FAIL" Set Global Variable ${privatekey} ${EMPTY}
Test SSH Connection ${vnf_ip_addr} ${username} ${password} ${privatekey}
Delete NS Instance Test
${status} ${message}= Run Keyword And Ignore Error Variable Should Exist ${privatekey}
Run Keyword If "${status}" == "FAIL" Set Global Variable ${privatekey} ${EMPTY}
Test SSH Connection ${vnf_ip_addr} ${username} ${password} ${privatekey}
Delete NS Instance Test