This is an 'easy' upgrade that requires a minor change in
common/build.gradle and the removal of an unnecessary import in buildSrc.
Gradle 7.4 and above has breaking changes that break the latest nebula lint plugin. We may have to wait a while.
Some retriers are no longer needed because transactions are
automatically retried by the JPA transaction manager when there's a
transient exception.
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* Fix Gradle dependency version pinning
In Gradle 7, version labels require '!!' at the end to be free from
any forced upgrade.
Hibernate min version needs to be advanced past 5.6.12, which is buggy.
Upgraded most dependencies to the latest version.
* Upgrade App Engine Standard to Java 17 w/ bundled APIs
Note that this doesn't yet upgrade our actual Gradle scripts to use a more
recent of Java (that will happen separately); this solely affects the GAE
instances.
I followed the instructions here:
https://cloud.google.com/appengine/docs/standard/java-gen2/services/access
And note that I removed threadsafe true from appengine's XML config because
that doesn't do anything anymore and was just throwing errors (the new
instances handle multiple requests in parallel by default, no configuration
necessary).
* 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
