About thread problem of service execution in Ignite Service Grid

[李玉珏]

Hi，

When in service grid service execution, if the local node deployment 
services, will directly call the local deployment service, otherwise it 
will find the service in the grid.

The local service, and the caller will use the same thread, in this 
case, the two threads‘s state is different, that is to say, the same 
call, have different behavior in different scene, I think the design is 
not reasonable.

For example, a thread local variable is defined, and according to the 
above description, the value of the same variable may be different for 
different scenarios.