Fix network tests to use get_test_instance_port

tests/components/camera/test_init.py

@@ -7,10 +7,12 @@ import pytest
 from homeassistant.bootstrap import setup_component
 from homeassistant.const import ATTR_ENTITY_PICTURE
 import homeassistant.components.camera as camera
+import homeassistant.components.http as http
 from homeassistant.exceptions import HomeAssistantError
 from homeassistant.util.async import run_coroutine_threadsafe
 
-from tests.common import get_test_home_assistant, assert_setup_component
+from tests.common import (
+    get_test_home_assistant, get_test_instance_port, assert_setup_component)
 
 
 class TestSetupCamera(object):
@@ -43,6 +45,10 @@ class TestGetImage(object):
         """Setup things to be run when tests are started."""
         self.hass = get_test_home_assistant()
 
+        setup_component(
+            self.hass, http.DOMAIN,
+            {http.DOMAIN: {http.CONF_SERVER_PORT: get_test_instance_port()}})
+
         config = {
             camera.DOMAIN: {
                 'platform': 'demo'