docs: add sample for timeout for one RPC

[olavloite]

Adds a sample for setting a timeout for a single RPC.

Fixes GoogleCloudPlatform/java-docs-samples#3805

[eaball35]

[olavloite]

@eaball35 These RESOURCE_EXHAUSTED errors have been mitigated by #669, which is included in version 3.1.0. The sample builds are currently using version 3.0.4. I'm afraid the only possible mitigation at this moment is retrying the test run.

[lesv]

Testing can't possibly ever work.

[codecov]

Codecov Report

Merging #707 (e6a34d9) into master (d49517f) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #707   +/-   ##
=========================================
  Coverage     85.05%   85.05%           
  Complexity     2556     2556           
=========================================
  Files           142      142           
  Lines         13930    13930           
  Branches       1326     1326           
=========================================
  Hits          11848    11848           
  Misses         1526     1526           
  Partials        556      556           

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[olavloite]

@lesv Would you mind taking a second look at this PR? The PR is currently blocked from merging as you requested changes.

[lesv]

@olavloite Apologies for the delay, what I'm concerned about is that we might test with many PR's / java version tests running at the same time, I'm concerned that you will have collisons.

I was probably stuck on table names of Singers & Venues, but that's not really the problem since you are creating an instance and then deleting it. The code in createTestDatabase appears to use EnvVar, it's unclear if that's unique. It also falls back to using the last instanceId, but that looks like it should at least have a while in there somewhere, and actually go to a next id rather than the last one to have something unique.

I'm going to release my objection so you can move forward - again I missed the email or I'd have responded earlier. Apologies.

If you believe I'm wrong in my concern, feel free to merge, if not could you fix it and explain where my understanding is flawed?

[lesv]

I found the discussion. LGTM