DefaultInMemoryCachingProvider not remove _Lock on dataRetriever exception

[Zonnery]

Steps to Reproduce

1. Set LockMs setting to N seconds (100000 for example)
2. Call GetAsync DefaultInMemoryCachingProvider with data retriever that throws an exception
3. Call GetAsync with same key in parallel.
4. GetAsync call on step 3 will be await for N seconds cause DefaultInMemoryCachingProvider will not remove _Lock flag on exception.

Related code

EasyCaching/src/EasyCaching.InMemory/DefaultInMemoryCachingProvider.cs

Lines 120 to 135 in 152cbe7

	var res = dataRetriever();
	if (res != null || _options.CacheNulls)
	{
	Set(cacheKey, res, expiration);
	//remove mutex key
	_cache.Remove($"{cacheKey}_Lock");
	return new CacheValue<T>(res, true);
	}
	else
	{
	//remove mutex key
	_cache.Remove($"{cacheKey}_Lock");
	return CacheValue<T>.NoValue;
	}

Solution:
Remove _Lock key also when dataRetriever throw an exception.

[catcherwong]

@Zonnery Thanks for your interest in this project.

Please have a try with the newest pre-release version.