Wrong http status issue #52

src/main/java/com/telekom/m2m/cot/restsdk/measurement/MeasurementApi.java

@@ -50,8 +50,9 @@ public MeasurementApi(CloudOfThingsRestClient cloudOfThingsRestClient) {
      */
     public Measurement getMeasurement(String id) {
         String response = cloudOfThingsRestClient.getResponse(id, MEASUREMENTS_API, CONTENT_TYPE_MEASUREMENT);
+        //assuming: when response is null, then http status code is 404
         if (response == null) {
-            throw new CotSdkException("Measurement not found (id='" + id + "')");
+            throw new CotSdkException(404, "Measurement not found (id='" + id + "')");
         }
         return new Measurement(gson.fromJson(response, ExtensibleObject.class));
     }

src/test/java/com/telekom/m2m/cot/restsdk/CloudOfThingsRestClientTest.java

@@ -2,10 +2,7 @@
 
 
 import com.telekom.m2m.cot.restsdk.util.CotSdkException;
-import okhttp3.Call;
-import okhttp3.OkHttpClient;
-import okhttp3.Request;
-import okhttp3.Response;
+import okhttp3.*;
 import org.powermock.api.mockito.PowerMockito;
 import org.powermock.core.classloader.annotations.PrepareForTest;
 import org.powermock.modules.testng.PowerMockTestCase;