Include FailoverPingTests in project file
Check for request specific config timeout in async request
Merge branch 'develop' of https://github.com/elasticsearch/elasticsearch-net into develop

Conflicts:
	src/Tests/Nest.Tests.Integration/Nest.Tests.Integration.csproj
Increase ElapsedMilliseconds to 200 in sync failover ping test
Merge branch 'develop' of https://github.com/elasticsearch/elasticsearch-net into develop