Merge branch 'fix/test-sincos-solverfactory-dune-version' into 'master'

[fix] Solver factory is available from Dune 2.7

See merge request !2003

(cherry picked from commit 4ca52a7d)

b47ee0f6 [fix] Solver factory is available from Dune 2.7

test/freeflow/navierstokes/sincos/main.cc

@@ -47,7 +47,7 @@
 #include <dumux/nonlinear/newtonsolver.hh>
 
 #include <dune/common/version.hh>
-#if DUNE_VERSION_NEWER_REV(DUNE_ISTL,2,7,1)
+#if DUNE_VERSION_GTE(DUNE_ISTL,2,7)
 #include <dumux/linear/istlsolverfactorybackend.hh>
 #endif