PROTON-2099: [Python] fix example runner to work with python2 - Make the tests a whole lot more readable while we're at it.
PROTON-2099: [Python] fix example runner to work with python2
- Make the tests a whole lot more readable while we're at it.

astitcher/qpid-proton,gemmellr/qpid-proton,ssorj/qpid-proton,astitcher/qpid-proton,ChugR/qpid-proton,ssorj/qpid-proton,gemmellr/qpid-proton,kgiusti/qpid-proton,ssorj/qpid-proton,apache/qpid-proton,kgiusti/qpid-proton,gemmellr/qpid-proton,ssorj/qpid-proton,gemmellr/qpid-proton,gemmellr/qpid-proton,gemmellr/qpid-proton,apache/qpid-proton,apache/qpid-proton,ChugR/qpid-proton,kgiusti/qpid-proton,astitcher/qpid-proton,ssorj/qpid-proton,ChugR/qpid-proton,apache/qpid-proton,astitcher/qpid-proton,ssorj/qpid-proton,ChugR/qpid-proton,kgiusti/qpid-proton,astitcher/qpid-proton,apache/qpid-proton,kgiusti/qpid-proton,astitcher/qpid-proton,ChugR/qpid-proton,ChugR/qpid-proton,apache/qpid-proton,kgiusti/qpid-proton