Anasazi: create GeneralizedDavidson Tpetra tests

[cwschilly]

@trilinos/anasazi
@hkthorn

Motivation

This PR creates the following tests in the tpetra/test/GeneralizedDavidson directory:

• cxx_main_nh.cpp
• cxx_main.cpp
• cxx_main_lap.cpp

---

cxx_main_nh.cpp is modeled after the current test in the Epetra test directory (basically a one-to-one conversion, changing E's to T's)

cxx_main.cpp and cxx_main_lap.cpp are modeled after the tests of other solvers in the Tpetra test directory. Since the GeneralizedDavidson solver does not support complex types, cxx_main.cpp uses the same logic as the cxx_main_complex.cpp tests for the other solvers, but uses ST=double instead.

[trilinos-autotester]

Status Flag 'Pre-Test Inspection' - - This Pull Request Requires Inspection... The code must be inspected by a member of the Team before Testing/Merging
NO INSPECTION HAS BEEN PERFORMED ON THIS PULL REQUEST! - This PR must be inspected by setting label 'AT: PRE-TEST INSPECTED'.

[hkthorn]

Fix cxx_main.cpp test to replicate anasazi/epetra/test/GeneralizedDavidson/cxx_main.cpp test.

[hkthorn]

It is my understanding that the mhd1280b.cua file contains a complex-valued matrix stored as interleaved doubles, so it's not useful for this test. Since the Generalized Davidson solver only works for real scalar types, this test should replicate the anasazi/epetra/test/GeneralizedDavidson/cxx_main.cpp test instead of the other cxx_main.cpp tests in the Tpetra directory.

[jwillenbring]

@hkthorn So you are saying that this test should be modeled after a different existing test?

[trilinos-autotester]

Status Flag 'Pre-Test Inspection' - - This Pull Request Requires Inspection... The code must be inspected by a member of the Team before Testing/Merging
NO INSPECTION HAS BEEN PERFORMED ON THIS PULL REQUEST! - This PR must be inspected by setting label 'AT: PRE-TEST INSPECTED'.