Move CI/CD variable into gitlab-ci file

There are too many CI/CD variables that are not necessarily secret to hide from being committed into the codebase.

• ANSIBLE_VAR_TOKEN
• AWS_ACCESS_KEY_ID
• AWS_DEFAULT_REGION
• AWS_HOST
• AWS_SECRET_ACCESS_KEY
• CAMPUS_IP
• CHEAHA_IP
• DEV_KEY
• OS_APPLICATION_CREDENTIAL_ID
• OS_APPLICATION_CREDENTIAL_SECRET
• OS_AUTH_TYPE
• OS_AUTH_URL
• OS_IDENTITY_API_VERSION
• OS_INTERFACE
• OS_REGION_NAME
• PKR_VAR_root_ssh_key
• TEST_IP