Add run_tests.sh to congress

This patch adds run_test.sh and includes the required files from
oslo-incubator that are needed for it.

run_tests.sh was shameless taken from neturon and renamed to congress.

Change-Id: I82a00726090e4b2eb01fd174c9e2f77a8a1e5847
Closes-bug: 1339900
Merge "Add run_tests.sh to congress"