[linearelliptic...estimator] added LocalDiffusiveFluxOS2014Star
[test.linearelliptic-block-swipdg]

Let EocStudyBlockSWIPDGExpectations also provide the expected rate.
[linearelliptic...block-swipdg-estimator] fix OS2014 for parametric cases

Forgot to compute the parameter factors...
[linearelliptic...block-swipdg-estimator] added OS2014Star
[test.linearelliptic-block-swipdg] added efficiency for OS2014_*
[test.OS2014] only print the test header the first time
[test.OS2014] do not print timings
[test.OS2014] added eta_DF_comparison_01_subdomain
[test...block-swipdg-expectations] added some for eta_df_comparison