Fix branch mapping logic to ensure correct environment assignment#1263

EamonnODonnell wants to merge 3 commits intoopendevstack:masteropendevstack/ods-jenkins-shared-library:masterfrom

EamonnODonnell:bugfix/EDPC-4079-shared-library-branch-mappingEamonnODonnell/ods-jenkins-shared-library:bugfix/EDPC-4079-shared-library-branch-mappingCopy head branch name to clipboard