authlib: convert exception handling to Py3 style
daemon: convert exception handling to Py3 style
authlib: convert exception handling to Py3 style
backend: convert exception handling to Py3 style
xmlrpc: convert exception handling to Py3 style
Merge pull request #596 from plajjan/travis-ci/add-python3

Add Python3 test to Travis-CI build matrix
Merge branch '579-pynipap-py3' of https://github.com/dosomder/NIPAP into dosomder-579-pynipap-py3