<cart version> origin_runtime_219, Update carts and manifests with new versions, handle version change in upgrade code
https://trello.com/c/evcTYKdn/219-3-adjust-out-of-date-cartridge-versions

Modified upgrade.rb to use the next_manifest when calculating the
updated IDENT info

Updated version numbering in phpmyadmin manifests to avoid display of
minor version number, per linked trello card

run gear extension ident mapping if defined

add symlinks for phpmyadmin cart software version 3