test_repository_tool: Add missing clear_all flag

Without this the next create_*db() call will fail meaning
   pytest test_repository_tool.py
fails on every test after this one.

Signed-off-by: Jussi Kukkonen <[email protected]>

Author: Jussi Kukkonen

tests/test_repository_tool.py

@@ -1110,8 +1110,8 @@ def setUp(self):
 
 
   def tearDown(self):
-    tuf.roledb.clear_roledb()
-    tuf.keydb.clear_keydb()
+    tuf.roledb.clear_roledb(clear_all=True)
+    tuf.keydb.clear_keydb(clear_all=True)