When attempting to add the certificate, it was discovered that start-app.sh installs the ca-certificate only if it is running as a root user. After an investigation, it was discovered that the docker file (Dockerfile.so-app) which runs the "start-app.sh" script as non-root user, this means ca certificates are never loaded into the running SO pod.

The following review made the change which changed the user which runs this "start-app.sh": https://gerrit.onap.org/r/c/so/+/103292.