* Convert to gradle 7.
* More fixes, regenerated lockfiles.
* Update lockfiles for dependency update.
* Fix show_upgrade_diff for new lockfile format
* Add property for allowInsecureProtocol
Allow us to override the restriction against use of plain HTTP for
communication to dependency repositories. We need this to be able to use a
local proxy for dependency gathering.
* Checking in missing gradle.lockfile
* Fix dependency-locking config
Reenable dependency locking after a bug errorneouly turned it off.
Removed the guava-related workaround that forcefully resolve to
the -jre distribution.
Enabled locking for buildSrc by updating its property file.
Updated all lock files.
