make(java): Update examples to use maven (#202)

* Fix RandomTsp.java

examples/java/LinearAssignmentAPI.java

@@ -10,22 +10,17 @@
 // 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.
-package com.google.ortools.examples;
+package com.google.ortools.java;
 
+import com.google.ortools.Loader;
 import com.google.ortools.graph.LinearSumAssignment;
 
 /**
  * Test assignment on a 4x4 matrix. Example taken from
  *  http://www.ee.oulu.fi/~mpa/matreng/eem1_2-1.htm with kCost[0][1]
  *  modified so the optimum solution is unique.
- *
  */
-
 public class LinearAssignmentAPI {
-  static {
-    System.loadLibrary("jniortools");
-  }
-
   private static void runAssignmentOn4x4Matrix() {
     final int numSources = 4;
     final int numTargets = 4;
@@ -52,6 +47,7 @@ public class LinearAssignmentAPI {
   }
 
   public static void main(String[] args) throws Exception {
+    Loader.loadNativeLibraries();
     LinearAssignmentAPI.runAssignmentOn4x4Matrix();
   }
 }