Make MemoryManagerServiceWithAllocationPolicyImpl the default MemoryManagerService implementation

{{

{MemoryManagerServiceWithAllocationPolicyImpl}}} extends {MemoryManagerServiceImpl}}} and adds the ability to specify an {AllocationPolicy}.

{{{MemoryManagerServiceImpl} has a somehow strange behavior, it try a second time to allocate space in a buffer if the first allocation failed. This behavior is generalized and configurable in {{{MemoryManagerServiceWithAllocationPolicyImpl}

}}, and the default {{

{RoundRobinAllocationPolicy}

}} is even by default configured to 2.