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

Update template full_metadata.xml for ISO XML to include these links
Change to MI_Metadata instead
Restored 'OWS' link, but with added params for GetCapabilities response
Changed the get_query_set syntax and attempt to fix some ISO metadata structure errors that fail validation
fixed permission check for publishing wms
make flake8 happy except long lines
added license_help_text
Merge pull request #1637 from ischneider/flake8-pavement

make flake8 happy except long lines
Merge pull request #1638 from state-hiu/licenses_minor_fix

License Help Text.
I will make flake8 happy right after.
Satisfying a pep8 recommendation.
Moved populate_maplayers, adjusted import statement in tests.py.
Merge pull request #1640 from brylie/master

Moved populate_maplayers, adjusted import statement in tests.py. Fixes  #1473
One more try to fix RelatedManager, going to link_type__in
Add some more srv: metadata elements and try another RelatedManager error approach
Duh, realized it was the Attribute for loop and not Links in full_metadata.xml
Re-jerry rig the full_metadata.xml template for ISO metadata namespaces, etc, hopefully work
Fix matching base MD_Metadata
fixed a few license layout issues
Merge pull request #1641 from state-hiu/licenses_minor_fix_2

License Layout Fix
Added CI_RoleCode to the featureCatalogCitation