[build] Fix master build after release 4.9.0

[sijie]

Descriptions of the changes in this PR:

Motivation

when creating branch-4.9, maven release plugin doesn't bump the version for stream modules.

Modifications

run mvn versions:set to manually fix the version for all modules

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• [skip integration tests]: skip docker based integration tests. if you make java code changes, you shouldn't skip integration tests.
• [skip build java8]: skip build on java8. ONLY skip this when ONLY changing files under documentation under site.
• [skip build java9]: skip build on java9. ONLY skip this when ONLY changing files under documentation under site.

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