Fix cache lock provider allowing multiple locks to be acquired. · FoundatioFx/Foundatio@be0d1fd

Run Tests: _/tests/Foundatio.Tests/Caching/InMemoryCacheClientTests.cs#L199

Assert.False() Failure Expected: False Actual: True

System.Threading.Tasks.TaskCanceledException : A task was canceled.

Process completed with exit code 1.

Build: src/Foundatio.TestHarness/Locks/LockTestBase.cs#L58

'Run.InParallelAsync(int, Func<int, Task>)' is obsolete: 'Use Parallel.ForEachAsync'

Build: src/Foundatio.TestHarness/Jobs/JobQueueTestsBase.cs#L77

'Run.InParallelAsync(int, Func<int, Task>)' is obsolete: 'Use Parallel.ForEachAsync'

Build: src/Foundatio.TestHarness/Jobs/JobQueueTestsBase.cs#L102

'Run.InParallelAsync(int, Func<int, Task>)' is obsolete: 'Use Parallel.ForEachAsync'

Build: src/Foundatio.TestHarness/Jobs/JobQueueTestsBase.cs#L150

'Run.InParallelAsync(int, Func<int, Task>)' is obsolete: 'Use Parallel.ForEachAsync'

Build: src/Foundatio.TestHarness/Jobs/JobQueueTestsBase.cs#L162

'Run.InParallelAsync(int, Func<int, Task>)' is obsolete: 'Use Parallel.ForEachAsync'

Build: src/Foundatio.TestHarness/Caching/CacheClientTestsBase.cs#L213

'Run.InParallelAsync(int, Func<int, Task>)' is obsolete: 'Use Parallel.ForEachAsync'

Build: src/Foundatio.TestHarness/Messaging/MessageBusTestBase.cs#L251

'Run.InParallelAsync(int, Func<int, Task>)' is obsolete: 'Use Parallel.ForEachAsync'

Build: src/Foundatio.TestHarness/Messaging/MessageBusTestBase.cs#L285

'Run.InParallelAsync(int, Func<int, Task>)' is obsolete: 'Use Parallel.ForEachAsync'

Build: src/Foundatio.TestHarness/Messaging/MessageBusTestBase.cs#L294

'Run.InParallelAsync(int, Func<int, Task>)' is obsolete: 'Use Parallel.ForEachAsync'

Build: src/Foundatio.TestHarness/Messaging/MessageBusTestBase.cs#L315

'Run.InParallelAsync(int, Func<int, Task>)' is obsolete: 'Use Parallel.ForEachAsync'

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