Address data race in task processor test

[taylanisikdemir]

What changed?
History task processor failed in CI with a data race issue (see below). Addressing it by stopping the processor instances.

WARNING: DATA RACE
Read at 0x00c000e91563 by goroutine 380:
  ...
  go.uber.org/zap/zapcore.(*ioCore).Write()
      /home/runner/go/pkg/mod/go.uber.org/zap@v1.13.0/zapcore/core.go:90 +0x192
  go.uber.org/zap/zapcore.(*CheckedEntry).Write()
      /home/runner/go/pkg/mod/go.uber.org/zap@v1.13.0/zapcore/entry.go:216 +0x20f
  github.com/uber/cadence/common/log/loggerimpl.(*loggerImpl).Debug()
      /home/runner/work/cadence/cadence/common/log/loggerimpl/logger.go:132 +0xc4
  github.com/uber/cadence/common/task.(*weightedRoundRobinTaskSchedulerImpl).dispatcher()
      /home/runner/work/cadence/cadence/common/task/weighted_round_robin_task_scheduler.go:202 +0x19a
  github.com/uber/cadence/common/task.(*weightedRoundRobinTaskSchedulerImpl).Start.gowrap1()
      /home/runner/work/cadence/cadence/common/task/weighted_round_robin_task_scheduler.go:109 +0x33

Previous write at 0x00c000e91563 by goroutine 178:
  testing.tRunner.func1()
      /opt/hostedtoolcache/go/1.22.1/x64/src/testing/testing.go:1676 +0x8fa
  runtime.deferreturn()
      /opt/hostedtoolcache/go/1.22.1/x64/src/runtime/panic.go:602 +0x5d
  github.com/stretchr/testify/suite.Run.func1()
      /home/runner/go/pkg/mod/github.com/stretchr/testify@v1.8.3/suite/suite.go:187 +0x30f
  testing.tRunner()
      /opt/hostedtoolcache/go/1.22.1/x64/src/testing/testing.go:1689 +0x21e
  testing.(*T).Run.gowrap1()
      /opt/hostedtoolcache/go/1.22.1/x64/src/testing/testing.go:1742 +0x44

How did you test it?
go test -timeout 60s -run ^TestQueueTaskProcessorSuite$ github.com/uber/cadence/service/history/task -race -count=10 -v

[coveralls]

Pull Request Test Coverage Report for Build 018e62dc-7edf-4be0-89ed-022adf2abc15

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 97 unchanged lines in 15 files lost coverage.
• Overall coverage decreased (-0.05%) to 65.368%

---

Files with Coverage Reduction	New Missed Lines	%
common/task/parallel_task_processor.go	2	93.06%
common/persistence/sql/sqlplugin/mysql/task.go	2	73.68%
service/matching/db.go	2	73.23%
service/history/task/transfer_active_task_executor.go	2	72.38%
service/history/execution/mutable_state_util.go	2	78.48%
common/persistence/sql/sqlplugin/mysql/db.go	2	79.49%
common/log/tag/tags.go	3	50.18%
service/history/task/fetcher.go	3	85.57%
service/history/task/transfer_standby_task_executor.go	4	87.01%
service/matching/taskReader.go	5	83.55%

Totals
Change from base Build 018e62d9-fbff-45f0-aae4-8ed26ea015dc:	-0.05%
Covered Lines:	95553
Relevant Lines:	146178

---

💛 - Coveralls