travis: separate install from test run
explicit requirements.txt installation
remove disabled delete_organizations command
travis: correct datastore db name
travis: fix datastore read_url
travis: init db after all config changes
travis: simplify datastore config changes
travis: more closely match ckan datastore/db config
travis: fix db owners
travis: remove custom db url in test-core.ini
travis: fewer configuration files
Merge pull request #375 from wardi/master

simpler+cleaner travis config, remove disabled delete-organizations command