veyron/runtimes/google/ipc: fix full_test (which was using the now deleted simple mounttable implementation) by defining an even simpler implementation solely for the use of this unit test.
veyron/runtimes/google/ipc: fix full_test (which was using the now deleted
simple mounttable implementation) by defining an even simpler implementation
solely for the use of this unit test.

While we're at it, clean up the createClientAndServer utility method a bit by
grouping the objects it sets up into a bundle.

Change-Id: I6ff7404308d067055462cd63e665eefe389341cf

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref