Previously there are a lot of warning messages of setuptools
in the log files of tox jobs. This is mainly caused by test
samples because these are in python codes directories.
This patch moves test samples from under
{tosca-parser_root}/toscaparser/tests to under
{tosca-parser_root}/samples/tests.
This patch also contains the following changes:
* Removed unused test samples.
* Fixed usage.rst command example.
* Changeing unit tests that reference external URL to use mock
* Mock methods used in unit tests have been made into common methods.
Change-Id: I80ab6ce0b3344f19afb4d16554c799747b1f2567
1b9281a22c