fix(test): Fix flaky queue integration test (#3382)

The test are starting to fail quite frequently with an assertion
failure "Pipeline did not complete".  This is because we assert
that an execution has started within 5 seconds of requesting it,
which appears to fail frequently when running in constrained CPU
environments.

Double the timeout to 10 seconds to alleviate the issue, though
a better fix would probably be to avoid having an arbitrary timeout
at all.  (Perhaps the test function could wait until the queue
is quiescent before proceeding?)

orca-queue-tck/src/main/kotlin/com/netflix/spinnaker/orca/q/ExecutionLatch.kt

@@ -43,7 +43,7 @@ class ExecutionLatch(private val predicate: Predicate<ExecutionComplete>) :
     }
   }
 
-  fun await() = latch.await(5, TimeUnit.SECONDS)
+  fun await() = latch.await(10, TimeUnit.SECONDS)
 }
 
 fun ConfigurableApplicationContext.runToCompletion(execution: Execution, launcher: (Execution) -> Unit, repository: ExecutionRepository) {