Reorganize unit test locations under tests/unittests (#1126)

This attempts to standardize unit test file location under test/unittests/
such that any source file located at cloudinit/path/to/file.py may have a
corresponding unit test file at test/unittests/path/to/test_file.py.

Noteworthy Comments:
====================
Four different duplicate test files existed:
test_{gpg,util,cc_mounts,cc_resolv_conf}.py
Each of these duplicate file pairs has been merged together. This is a
break in git history for these files.

The test suite appears to have a dependency on test order. Changing test
order causes some tests to fail. This should be rectified, but for now
some tests have been modified in
tests/unittests/config/test_set_passwords.py.

A helper class name starts with "Test" which causes pytest to try
executing it as a test case, which then throws warnings "due to Class
having __init__()".  Silence by changing the name of the class.

# helpers.py is imported in many test files, import paths change
cloudinit/tests/helpers.py -> tests/unittests/helpers.py

# Move directories:
cloudinit/distros/tests -> tests/unittests/distros
cloudinit/cmd/devel/tests -> tests/unittests/cmd/devel
cloudinit/cmd/tests -> tests/unittests/cmd/
cloudinit/sources/helpers/tests -> tests/unittests/sources/helpers
cloudinit/sources/tests -> tests/unittests/sources
cloudinit/net/tests -> tests/unittests/net
cloudinit/config/tests -> tests/unittests/config
cloudinit/analyze/tests/ -> tests/unittests/analyze/

# Standardize tests already in tests/unittests/
test_datasource -> sources
test_distros -> distros
test_vmware -> sources/vmware
test_handler -> config        # this contains cloudconfig module tests
test_runs -> runs

1 files changed, 4 insertions, 4 deletions

diff --git a/tests/unittests/util.py b/tests/unittests/util.py
index 383f5f5c..2204c28f 100644
--- a/tests/unittests/util.py
+++ b/tests/unittests/util.py
@@ -15,7 +15,7 @@ def get_cloud(distro=None, paths=None, sys_cfg=None, metadata=None):
     """
     paths = paths or helpers.Paths({})
     sys_cfg = sys_cfg or {}
-    cls = distros.fetch(distro) if distro else TestingDistro
+    cls = distros.fetch(distro) if distro else MockDistro
     mydist = cls(distro, sys_cfg, paths)
     myds = DataSourceTesting(sys_cfg, mydist, paths)
     if metadata:
@@ -49,14 +49,14 @@ class DataSourceTesting(DataSourceNone):
         return 'testing'
 
 
-class TestingDistro(distros.Distro):
-    # TestingDistro is here to test base Distro class implementations
+class MockDistro(distros.Distro):
+    # MockDistro is here to test base Distro class implementations
     def __init__(self, name="testingdistro", cfg=None, paths=None):
         if not cfg:
             cfg = {}
         if not paths:
             paths = {}
-        super(TestingDistro, self).__init__(name, cfg, paths)
+        super(MockDistro, self).__init__(name, cfg, paths)
 
     def install_packages(self, pkglist):
         pass