This patch adds a new parameter named custom_wsgi_script_aliases
to the openstacklib::wsgi::apache class. This can be used to specify
extra WSGI script alias statements for the apache::vhost resource
which is merged with the default one calculated using $path,
$wsgi_script_dir and $wsgi_script_file.
This is the final piece to be able to move keystone::wsgi::apache
over to using openstacklib::wsgi::apache.
Change-Id: I31096140a6f355ec99496053fb06ce6c73094180
809396defb