reorganize all sat samples to have regular naming

Remove sub-method in C# sat sample, just use Main()

ortools/sat/samples/SolveAndPrintIntermediateSolutionsSampleSat.java

@@ -0,0 +1,70 @@
+// Copyright 2010-2018 Google LLC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import com.google.ortools.sat.CpModel;
+import com.google.ortools.sat.CpSolver;
+import com.google.ortools.sat.CpSolverSolutionCallback;
+import com.google.ortools.sat.IntVar;
+
+public class SolveWithIntermediateSolutions {
+  static {
+    System.loadLibrary("jniortools");
+  }
+
+  static class VarArraySolutionPrinterWithObjective extends CpSolverSolutionCallback {
+    public VarArraySolutionPrinterWithObjective(IntVar[] variables) {
+      variableArray = variables;
+    }
+
+    @Override
+    public void onSolutionCallback() {
+      System.out.printf("Solution #%d: time = %.02f s%n", solutionCount, wallTime());
+      System.out.printf("  objective value = %f%n", objectiveValue());
+      for (IntVar v : variableArray) {
+        System.out.printf("  %s = %d%n", v.getName(), value(v));
+      }
+      solutionCount++;
+    }
+
+    public int getSolutionCount() {
+      return solutionCount;
+    }
+
+    private int solutionCount;
+    private final IntVar[] variableArray;
+  }
+
+  public static void main(String[] args) throws Exception {
+    // Create the model.
+    CpModel model = new CpModel();
+    // Create the variables.
+    int numVals = 3;
+
+    IntVar x = model.newIntVar(0, numVals - 1, "x");
+    IntVar y = model.newIntVar(0, numVals - 1, "y");
+    IntVar z = model.newIntVar(0, numVals - 1, "z");
+    // Create the constraint.
+    model.addDifferent(x, y);
+
+    // Maximize a linear combination of variables.
+    model.maximizeScalProd(new IntVar[] {x, y, z}, new int[] {1, 2, 3});
+
+    // Create a solver and solve the model.
+    CpSolver solver = new CpSolver();
+    VarArraySolutionPrinterWithObjective cb =
+        new VarArraySolutionPrinterWithObjective(new IntVar[] {x, y, z});
+    solver.solveWithSolutionCallback(model, cb);
+
+    System.out.println(cb.getSolutionCount() + " solutions found.");
+  }
+}