Move http module to the root

tests/conftest.py

@@ -20,7 +20,7 @@ import time
 import pytest
 from click.testing import CliRunner
 
-from platformio.clients import http
+from platformio import http
 
 
 def pytest_configure(config):

tests/misc/test_misc.py

@@ -17,8 +17,7 @@
 import pytest
 import requests
 
-from platformio import __check_internet_hosts__, proc
-from platformio.clients import http
+from platformio import __check_internet_hosts__, http, proc
 from platformio.clients.registry import RegistryClient