Allow Epetra-free build of the Tpetra stack used by Albany

Created by: gahansen

We have recently added the ability to build Albany without any dependence on Epetra, to simplify building the code when only the templated stack capabilities are desired.

It appears to be possible to create a specialized Epetra-free Trilinos configuration to support this build with changes to Stratimikos and Amesos2. A change in Teko is needed as a side effect.

Please see pull request #314 for the changes that were made to support the build, along with the CMake build configuration that supports this Albany build.

/cc @bartlettroscoe @rppawlo @eric-c-cyr