PROTON-2219 Upgrade .travis.yml to test on a good cross-section of Ubuntu versions (#246)
PROTON-2219 Upgrade .travis.yml to test on a good cross-section of Ubuntu versions (#246)


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