allow force for pkglist_add

Using force option will allow 'pre-blocking' of packages which are not
in tag inheritance yet, but could cause a problem if they'll get to
inheritance chain somehow. In such case we don't have an owner for
package and using 'force' allows admin to introduce blocked package with
him as an owner.

Fixes: https://pagure.io/koji/issue/867

tests/test_cli/test_block_pkg.py

@@ -24,7 +24,7 @@ class TestBlockPkg(unittest.TestCase):
         tag = 'tag'
         dsttag = {'name': tag, 'id': 1}
         package = 'package'
-        args = [tag, package]
+        args = [tag, package, '--force']
         options = mock.MagicMock()
 
         # Mock out the xmlrpc server
@@ -46,7 +46,7 @@ class TestBlockPkg(unittest.TestCase):
         session.listPackages.assert_called_once_with(
             tagID=dsttag['id'], inherited=True)
         session.packageListBlock.assert_called_once_with(
-            tag, package)
+            tag, package, force=True)
         session.multiCall.assert_called_once_with(strict=True)
         self.assertNotEqual(rv, 1)
 
@@ -80,12 +80,12 @@ class TestBlockPkg(unittest.TestCase):
         activate_session_mock.assert_called_once_with(session, options)
         self.assertEqual(
             session.mock_calls, [
-                call.getTag(tag), call.listPackages(
-                    tagID=dsttag['id'], inherited=True), call.packageListBlock(
-                    tag, packages[0]), call.packageListBlock(
-                    tag, packages[1]), call.packageListBlock(
-                        tag, packages[2]), call.multiCall(
-                            strict=True)])
+                call.getTag(tag),
+                call.listPackages(tagID=dsttag['id'], inherited=True),
+                call.packageListBlock(tag, packages[0], force=False),
+                call.packageListBlock(tag, packages[1], force=False),
+                call.packageListBlock(tag, packages[2], force=False),
+                call.multiCall(strict=True)])
         self.assertNotEqual(rv, 1)
 
     @mock.patch('sys.stdout', new_callable=six.StringIO)