Fix imports for move of http module

Author: timopollmeier

tests/protocols/http/core/test_connector.py

@@ -12,7 +12,7 @@
 from httpx import HTTPError
 
 from gvm.protocols.http.core.connector import HttpApiConnector
-from gvm.protocols.http.core import ContentType
+from gvm.protocols.http.core.headers import ContentType
 
 TEST_JSON_HEADERS = {
     "content-type": "application/json;charset=utf-8",

tests/protocols/http/core/test_headers.py

@@ -4,7 +4,7 @@
 
 import unittest
 
-from gvm.protocols.http.core import ContentType
+from gvm.protocols.http.core.headers import ContentType
 
 
 class ContentTypeTestCase(unittest.TestCase):