generate-client doesn't work with docker & selinux

[gerrod3]

Problem is that pulp-openapi-generator adds a label to its directory when the bindings are generated and this prevents the oci-env container from being able to read the directory and install the bindings.

Need this change to the pulp-openapi-generator pulp/pulp-openapi-generator#79 and need the generate-client script to account for docker as well when setting the label.