community_block: fix tests
community_track: fix tests
Fix plugins_tests task
comment_group: fix more link
Merge branch 'fix_plugin_tests' of https://gitlab.com/participa/noosfero into plugins-tests
plugins/solr: disable automatic solr download

Just enabling the plugin (as when running plugins tests) will cause a
HUGE download to be made.
plugins/community_track: remove useless file creation in test
Revert dependency on test-unit
Merge branch 'master' of gitlab.com:noosfero/noosfero