ocm ci: append "\" before shell command output while parsing it

[venkataanil]

OCM CI failing with below errors
{{[2022-11-09, 05:00:23 EST] {subprocess.py:92} INFO - Clean-up existing OSD access keys..
[2022-11-09, 05:00:23 EST] {subprocess.py:92} INFO - -bash: line 20: conditional binary operator expected
[2022-11-09, 05:00:23 EST] {subprocess.py:92} INFO - -bash: line 20: syntax error near 2' [2022-11-09, 05:00:23 EST] {subprocess.py:92} INFO - -bash: line 20: if [[ -eq 2 ]]; then'
[2022-11-09, 05:00:23 EST] {subprocess.py:96} INFO - Command exited with return code 2}}

{{}}

Recently PR #255 introduced some code for identifying last active AWS key which is failing in CI run. Inside run_ocm_benchmark.sh, the script ssh into ocm CI jumphost and execute this code. So we need to add additional "" before parsing/using command output i.e

• AWS_KEY=$(aws iam list-access-keys --user-name OsdCcsAdmin --output text --query 'AccessKeyMetadata[*].AccessKeyId')
• LEN_AWS_KEY=echo $AWS_KEY | wc -w
• if [[ ${LEN_AWS_KEY} -eq 2 ]]; then

•    aws iam delete-access-key --user-name OsdCcsAdmin --access-key-id `printf ${AWS_KEY[0]}`
  

• AWS_KEY=$(/usr/bin/aws iam list-access-keys --user-name OsdCcsAdmin --output text --query 'AccessKeyMetadata[*].AccessKeyId')
• LEN_AWS_KEY=$(echo $AWS_KEY | wc -w)
• if [[ ${LEN_AWS_KEY} -eq 2 ]]; then

•   /usr/bin/aws iam delete-access-key --user-name OsdCcsAdmin --access-key-id \$(printf \${AWS_KEY[0]})