Allow for 200 response code from pgw 0.10.0

Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>

Author: brian-brazil

simpleclient_pushgateway/src/main/java/io/prometheus/client/exporter/PushGateway.java

@@ -313,10 +313,10 @@ void doRequest(CollectorRegistry registry, String job, Map<String, String> group
       }
 
       int response = connection.getResponseCode();
-      if (response != HttpURLConnection.HTTP_ACCEPTED) {
+      if (response/100 != 2) {
         String errorMessage;
         InputStream errorStream = connection.getErrorStream();
-        if(response >= 400 && errorStream != null) {
+        if(errorStream != null) {
           String errBody = readFromStream(errorStream);
           errorMessage = "Response code from " + url + " was " + response + ", response body: " + errBody;
         } else {

simpleclient_pushgateway/src/test/java/io/prometheus/client/exporter/PushGatewayTest.java

@@ -60,6 +60,16 @@ public void testPush() throws IOException {
     pg.push(registry, "j");
   }
 
+  @Test
+  public void testPush200Response() throws IOException {
+    mockServerClient.when(
+        request()
+          .withMethod("PUT")
+          .withPath("/metrics/job/j")
+      ).respond(response().withStatusCode(200));
+    pg.push(registry, "j");
+  }
+
   @Test(expected=IOException.class)
   public void testNon202ResponseThrows() throws IOException {
     mockServerClient.when(