This PR has several changes to make createbz better and more robust (I hope). It drops use of the unnecessarily complicated parse_multi (which we were only using to parse a comma-separated string into a list), does a bit more parsing of email addresses, tries to be much safer about email addresses not existing in Bugzilla, and adds another check for whether a tracker bug already exists to guard against the possibility of the script being run multiple times without the CSV data being updated.
This PR has several changes to make createbz better and more robust (I hope). It drops use of the unnecessarily complicated
parse_multi(which we were only using to parse a comma-separated string into a list), does a bit more parsing of email addresses, tries to be much safer about email addresses not existing in Bugzilla, and adds another check for whether a tracker bug already exists to guard against the possibility of the script being run multiple times without the CSV data being updated.