Add random suffix to IT resource IDs to avoid collision

[Polber]

There have been cases of name collisions on parallel tests, so adding random suffix to avoid collision.

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[Polber]

R: @Abacn

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Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control

[Abacn]

thanks! once https://github.com/GoogleCloudPlatform/DataflowTemplates/pull/1498 get in sync it once and will merge it

[damccorm]

@Abacn @Polber what are next steps here?

[Abacn]

Sorry did not track the progress. @Polber Could you please rebase onto latest master and fix the PreCommit ?

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[damccorm]

@Polber I think we still need this, right?