ebos: make it compile if ALUGrid is used as grid

the EQUIL init code from opm-core chokes hard if any Dune grid other
than Dune::CpGrid is passed to it. Until opm-core gets its act
together or EQUIL init is properly implemented within eWoms, let's
just disable EQUIL initialization in ebos (and print a warning) if
ALUGrid is used.

applications/ebos/eclproblem.hh

@@ -849,6 +849,9 @@ private:
 
     void readEquilInitialCondition_()
     {
+#if EBOS_USE_ALUGRID
+#warning "EQUIL-based initialization cannot yet be used with ALUGrid"
+#else
         // The EQUIL initializer also modifies the material law manager according to
         // SWATINIT (although it does not belong there strictly speaking)
         typedef Ewoms::EclEquilInitializer<TypeTag> EquilInitializer;
@@ -865,6 +868,7 @@ private:
             auto &elemFluidState = initialFluidStates_[elemIdx];
             elemFluidState.assign(equilInitializer.initialFluidState(elemIdx));
         }
+#endif
     }
 
     void readExplicitInitialCondition_()