[decoupled] test_mpfa2p returns 77 when ALUGrid not found.

This indicates skipped tests.
(reviewed and approved by becker)


git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@14495 2fb0f335-1f38-0410-981e-8018bf24f1b0

test/decoupled/2p/test_mpfa2p.cc

@@ -158,7 +158,7 @@ int main(int argc, char** argv)
 int main()
 {
     std::cerr << "You need to have ALUGrid installed to run this test\n";
-    return 1;
+    return 77;
 }
 
 #endif