Update tests.sh to locally install all Java packages, not just util

The JRuby test runs appear to be fetching the util package from Maven
Central because it is not being installed locally. This causes the tests
to fail when we upgrade to a new version that has not yet been published
to Maven Central. This commit fixes the problem by locally installing
all the protobuf packages, not just util.

Update protobuf version for 3.19.4 (protocolbuffers#9449)

I also updated the PHP release notes in
php/ext/google/protobuf/package.xml.

Update protobuf version

Tweak wording of CHANGES.txt

Tweak wording in CHANGES.txt

Update protobuf version

Update protobuf version (protocolbuffers#9167)

Update protobuf version (protocolbuffers#9119)

Update version to 3.19.0-rc2 and fix changelog about Java 7 (protocol…

…buffers#9116)

* Update protobuf version

* Update CHANGES.txt to reflect that we're not yet dropping Java 7

Update PHP release notes for 3.19.0 (protocolbuffers#9110)