Unless NOVA_USE_MOD_WSGI is False, run nova-api and nova-metadata
using uwsgi.
Because the metadata server is always expected to run on a port and
without a prefix, we have it configured to use uwsgi but not to
proxy from apache: uwsgi listens on the configured port itself.
uwsgi process that listen themselve do not need a socket or to
chmod-socket, so those config lines have been moved to the block
that is also writing proxy configuration for apache.
Because this change only uses uwsgi for nova-api and nova-api-meta,
nova-api-meta is set to default to enabled in stackrc because the
nova-api wsgi application used by wsgi only presents the one service
(osapi_compute).
If NOVA_USE_MOD_WSGI is False and tls_proxy service is enabled,
nova-api is run on an internal port reached via the tls_proxy.
Depends-On: I8ff08d61520ccf04e32dcd02f4cecc39dae823cb
Change-Id: If2d7e363a6541854f2e30c03171bef7a41aff745
b90bb1a461