fix: ensure data_volume isn't surrounded by quotes

[Aletor93]

Comprehensive Summary of your change

I'm generating harbor.yaml file with erb function to_yaml, where strings containing / are quoted. It can't be configured.

When I run ./install.sh script, it fails on docker volume command due to quotes which aren't removed:

prepare base dir is set to /srv/harbor/install
docker: Error response from daemon: create "/srv/harbor/data": "\"/srv/harbor/data\"" includes invalid characters for a local volume name, only "[a-zA-Z0-9][a-zA-Z0-9_.-]" are allowed. If you intended to pass a host directory, use absolute path.
See 'docker run --help'.

After editing the prepare script to remove quotes on data_volume if present, it works like a charm. The sed is already used in other scripts, it shouldn't be a problem to use it.

Issue being fixed

n/a (no issue opened)

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