mpi/solution_transfer_03: fix test concurrency

diff --git a/tests/mpi/solution_transfer_03.with_trilinos=true.with_trilinos_with_zoltan=true.output b/tests/mpi/solution_transfer_03.with_trilinos=true.with_trilinos_with_zoltan=true.mpirun=1.output
similarity index 100%
rename from tests/mpi/solution_transfer_03.with_trilinos=true.with_trilinos_with_zoltan=true.output
rename to tests/mpi/solution_transfer_03.with_trilinos=true.with_trilinos_with_zoltan=true.mpirun=1.output