Modify Links model to generate GetCapabilities links for WMS, WFS, WCS services

Update template full_metadata.xml for ISO XML to include these links
Restored 'OWS' link, but with added params for GetCapabilities response
Revert to bare WMS, WFS, WCS URLs in base_link, update gmd:protocol and other element values in ISO template
Merge branch 'master' of https://github.com/GeoNode/geonode
Merge pull request #1633 from mwengren/link_fix_pr

Modify Links model to generate GetCapabilities links for WMS, WFS, WCS