Avoid pollution and false positives with tox.ini

- removing sitepackages in tox.ini to avoid test env pollution
- skip_missing_interpreters in tox.ini set to False to avoid false
positives by skipping missing interpreters.

LP Related-Bug: #1823718
Change-Id: I7f8c99c31e3984720fb756cf36bd8dbe1aad3c55

src/tests/tests.yaml

@@ -4,7 +4,7 @@ tests:
 configure:
   - zaza.charm_tests.noop.setup.basic_setup
 gate_bundles:
-  - basic
+  - bionic-basic
 smoke_bundles:
-  - basic
+  - bionic-basic
 

src/tox.ini

@@ -1,6 +1,10 @@
 [tox]
 envlist = pep8
 skipsdist = True
+# NOTE(beisner): Avoid build/test env pollution by not enabling sitepackages.
+sitepackages = False
+# NOTE(beisner): Avoid false positives by not skipping missing interpreters.
+skip_missing_interpreters = False
 
 [testenv]
 setenv = VIRTUAL_ENV={envdir}

tox.ini

@@ -4,6 +4,10 @@
 [tox]
 skipsdist = True
 envlist = pep8,py37
+# NOTE(beisner): Avoid build/test env pollution by not enabling sitepackages.
+sitepackages = False
+# NOTE(beisner): Avoid false positives by not skipping missing interpreters.
+skip_missing_interpreters = False
 
 [testenv]
 setenv = VIRTUAL_ENV={envdir}