Make TCPServer and BladeAllocServer consistent

[João Carreira]

Right now TCPServer has the attribute max_objects which is inconsistent with the interface of the RDMAServer (which uses pool_size).

Both should use a raw count of bytes: pool_size.

In the same way, tcpservermain should allow setting the size of the server pool as a command line argument (but have default size).

Things to do:

1. Make TCPServer use pool_size (number of bytes in the pool) instead of the number of objects. Also, make it an argument of the constructor as in the BladeAllocServer
2. Make tcpservermain and bladeallocmain get arguments with the size of the pool (they both should have a default size of 10GB).
3. Fix the memory exhaustion test to use a small value for the server pools so that the servers throw an exception earlier. Tests should be quick

[Tyler Davis]

Should I set a default size for tcpservermain and bladeallocmain in the event that no size is passed in?

Nevermind, I reread and understand now