The preconditioned steepest-descent eigensolver was actually not using the...

The preconditioned steepest-descent eigensolver was actually not using the preconditioner. Updated the corresponding test.
31 jobs for fix_condition_cg in 0 seconds (queued for 10 seconds)
Status Job ID Name Coverage
  External
passed buildbot/distcheck

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passed buildbot/foss-2017a

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passed buildbot/foss-2017a_debug

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passed buildbot/foss-2017a_min

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failed buildbot/foss-2017a_mpi

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failed buildbot/foss-2017a_mpi_debug

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passed buildbot/foss-2017a_mpi_min

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failed buildbot/foss-2017a_mpi_opt

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passed buildbot/foss-2017a_opt

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failed buildbot/foss-2017a_ppc

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failed buildbot/foss-2017a_ppc_mpi

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failed buildbot/foss-2017b

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failed buildbot/foss-2017b_mpi

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failed buildbot/intel-2017a

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failed buildbot/intel-2017a_impi

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failed buildbot/intel-2017a_impi_omp

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passed buildbot/intel-2017a_omp

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passed buildbot/intel-2017b

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failed buildbot/intel-2017b_impi

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failed buildbot/pgi-2017.10

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failed buildbot/pgi-2017.10_mpi

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passed buildbot/tests

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passed codecov/patch

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passed codecov/project

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