NO-JIRA: Fix build script for Apache Jenkins CI to upgrade pip before using it. - This is an attempt to avoid some build failures that seem to be due to bad versions of pip
NO-JIRA: Fix build script for Apache Jenkins CI to upgrade pip before using it.
- This is an attempt to avoid some build failures that seem to be due to bad versions of pip

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