Moving to pbr is essential part since it allows to integrate repo with
OpenStack CI. For instance, it's mandatory to have pbr to make release
on PyPI by pushing tags to repo.
Change-Id: I17e45a9fc1d11c2c8a3fe555153fe61edc5c887d
Details:
* move main files into the top of the tree;
* move examples into examples folder;
* support new structure in run_test.sh and setup.py.
Result:
* update gitignore files to support run_test.sh;
* compatibility with openstack-gates;
* compatibility with standard pip installation via git+https.
Closes-Bug: #1479785
Change-Id: I93b51b0797eaf619614cb2a493a2a68d0f547751