patch errors in the nova plugin

Change-Id: I8b3035c7623e4f9ad791b3518db32bd2fb005f37
Fixing errors with tox config and pep8 errors

Change-Id: Iddbd796457a4d3d9e53d5ad08273b6825fd44f5b
Setup logging

Change-Id: I9ecf9bef5b42b2c99303436f7278c17869c07cff