ci: update testing-integration template parameters

[jrusz]

Adding _JAVA_OPTIONS for the selenium container.

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[app-sre-bot]

Can one of the admins verify this patch?

[ezr-ondrej]

/retest

[ezr-ondrej]

Looks quite sane to me, @mshriver and @akhil-jha FYI, I'm going to merge :)