VOL-1604 Implementing storage of MIB entities in etcd.

Updated tests to work and pulled a test update from https://gerrit.opencord.org/#/c/12815/. The functional changes were merged some time ago, but the test was not.
Updated requirements to match those in voltha-openonu-adapter. This fixed an issue where the test would fail on importing the etcd database class
Change-Id: I13787dbf740020eb2d7f2c6498f9eafe1b461cba
diff --git a/setup.py b/setup.py
index 02cf55b..4b60c7e 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,7 @@
 
 requirements = open(path.join(setup_dir, "requirements.txt")).read().splitlines()
 required = [line for line in requirements if not line.startswith("-")]
-print "Required is '{}'".format(required)
+print ("Required is '{}'".format(required))
 
 setup(
     name=package,