WIP - let already_installed check be vague

This lets 'install --force' force install
older or newer versions of a collection.

Fixes ansible#266

ansible_galaxy/actions/install.py

@@ -409,6 +409,8 @@ def install_repository(galaxy_context,
 
     log.debug('found_repository_spec: %s', found_repository_spec)
 
+    display_callback('Found %s for spec %s' % (found_repository_spec, requirement_spec_to_install.label))
+
     # See if the found collection spec is already installed and either warn or 'force_overwrite'
     # to remove existing first.
 
@@ -417,9 +419,13 @@ def install_repository(galaxy_context,
 
     # potential_repository_spec is a repo spec for the install candidate we potentially found.
     irdb = installed_repository_db.InstalledRepositoryDatabase(galaxy_context)
-    log.debug('Checking to see if %s is already installed', requirement_spec_to_install)
+    # log.debug('Checking to see if %s is already installed', requirement_spec_to_install)
+    log.debug('Checking to see if a collection named %s is already installed', found_repository_spec.label)
+
+    repository_spec_match_filter = matchers.MatchRepositorySpecNamespaceName([found_repository_spec])
 
-    already_installed_iter = irdb.by_requirement_spec(requirement_spec_to_install)
+    # already_installed_iter = irdb.by_requirement_spec(requirement_spec_to_install)
+    already_installed_iter = irdb.select(repository_spec_match_filter=repository_spec_match_filter)
     already_installed = sorted(list(already_installed_iter))
 
     log.debug('already_installed: %s', already_installed)