add Java snippets for creating, listing, and deleting queues

[aarjo]

Environment Variables need to be set:

• GOOGLE_CLOUD_PROJECT to the project id

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[lesv]

Do you need to update the README.md to mention these?

Also, I don't see any RegionTags -- You'll eventually want to add those.

[aarjo]

Do you need to update the README.md to mention these?

Also, I don't see any RegionTags -- You'll eventually want to add those.

I'll update the README, and I believe there are region tags starting above the imports, no?

Also, what would be the best way to resolve the static analysis error? Making the snippet methods private means they can't be called in the testing classes.

[lesv]

It's not required (or sometimes possible) to get all the static analysis errors. You can google them spotBugs to see if any of them are easy to fix. It's to get you to think about writing better code.

Yea - I just checked two files and didn't see them in the PR, but they were there. Just tell me when you'd like me to merge.

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