test(utils/db): Update iter method signature from BaseDB

Author: gfieni

tests/utils/db/db.py

@@ -67,7 +67,7 @@ def __init__(self, content=[]):
     def connect(self):
         self.q.put('connected', block=False)
 
-    def iter(self, stream_mode):
+    def iter(self, stream_mode: bool = False):
         return iter(self._content)
 
     def save(self, report):
@@ -92,7 +92,7 @@ def __init__(self, content=[]):
     def connect(self):
         pass
 
-    def iter(self, stream_mode):
+    def iter(self, stream_mode: bool = False):
         return iter(self._content)
 
     def save(self, report):