Optionally, block building modules with EOL streams.

Requested by @mboddu in:

- https://pagure.io/fm-orchestrator/issue/960
- https://pagure.io/modularity/issue/102

tests/test_utils/test_utils.py

@@ -551,6 +551,34 @@ class TestUtils:
         expected_tag = 'module-1cf457d452e54dda'
         assert tag == expected_tag
 
+    @patch("module_build_service.utils.submit.requests")
+    def test_pdc_eol_check(self, requests):
+        """ Push mock pdc responses through the eol check function. """
+
+        response = mock.Mock()
+        response.json.return_value = {"results": [{
+            "id": 347907,
+            "global_component": "mariadb",
+            "name": "10.1",
+            "slas": [{
+                "id": 694207,
+                "sla": "security_fixes",
+                "eol": "2019-12-01",
+            }],
+            "type": "module",
+            "active": True,
+            "critical_path": False,
+        }]}
+        requests.get.return_value = response
+
+        is_eol = module_build_service.utils.submit._is_eol_in_pdc('mariadb', '10.1')
+        assert not is_eol
+
+        response.json.return_value["results"][0]["active"] = False
+
+        is_eol = module_build_service.utils.submit._is_eol_in_pdc('mariadb', '10.1')
+        assert is_eol
+
 
 class DummyModuleBuilder(GenericBuilder):
     """