Eliminate build warning about ambiguous package list

Details:

* The vendorizing of 'nocasedict' and 'nocaselist' caused new Python packages to
  appear under the 'pywbem' package. This caused the build of the distribution
  wheel archive to complain about ambiguity of the package list. This did not
  affect the content of the wheel distribution archive.
  Eliminated the warning by specifying the new sub-packages in the 'packages'
  parameter of setuptools.setup().

Signed-off-by: Andreas Maier <andreas.r.maier@gmx.de>

docs/changes.rst

@@ -41,6 +41,9 @@ Released: not yet
 
 **Cleanup:**
 
+* Eliminated a warning about about ambiguity of the package list when building
+  the wheel distribution archive.
+
 **Known issues:**
 
 * See `list of open issues`_.

setup.py

@@ -263,6 +263,9 @@ class bdist_wheel(bdist_wheel_base):
     version=package_version,
     packages=[
         'pywbem',
+        'pywbem._vendor',
+        'pywbem._vendor.nocasedict',
+        'pywbem._vendor.nocaselist',
         'pywbem_mock'
     ],
     include_package_data=True,  # Includes MANIFEST.in files into sdist (only)