fix snap build

* use a different way to avoid depending on i18n in tox
 * add __init__.py files to new packages

console_conf/cmd/__init__.py

@@ -0,0 +1 @@
+#

setup.py

@@ -29,7 +29,7 @@ import sys
 
 setup_kwargs = {}
 # dpkg build uses build and install, tox uses sdist
-if sys.argv[1] in ("build", "install"):
+if 'SUBIQUITY_NO_I18N' not in os.environ:
     from DistUtilsExtra.command import build_extra
     from DistUtilsExtra.command import build_i18n
     setup_kwargs['cmdclass'] = {'build': build_extra.build_extra,

subiquity/cmd/__init__.py

@@ -0,0 +1 @@
+#

tox.ini

@@ -7,6 +7,7 @@ recreate = True
 [testenv]
 basepython = python3
 setenv =
+    SUBIQUITY_NO_I18N = 1
     FAKE_TRANSLATE = always
     PYTHONPATH = {toxinidir}/fake_deps