Clean up LCM test exes for case of shared build.

Modified link lines. Added bool TpetraBuild. While I was at it, added the flag
ENABLE_LCM_TEST_EXES. To mirror current behavior, it defaults to ON. But for
faster building when doing dev/debugging, set it to off in your Albany configure
script.
Remove some relics of the merge.
Modify to use Exodus mesh instead of internally generated mesh.

Unfortunately this breaks the test. It runs but uses quite a
bit of memory and never converges. I tried to make the boundary
conditions consistent with the example from Sierra but I must
be missing something.
[Mauro] FELIX Mpas interface, set TpetraBuild=true when using Tpetra. Thanks
Irina K.  This solves the issue of LOCA not storing correclty the solution in
the mesh.

[Irina] Added the option to felix_driver.cpp to run CISM-Albany with Tpetra and
Epetra software stack.  Preliminary experiments suggest with Tpetra the runs are
faster!