PLUGIN-1928: Refactor code

Author: sgarg-CS

src/main/java/io/cdap/plugin/servicenow/restapi/RestAPIClient.java

@@ -60,7 +60,7 @@ public abstract class RestAPIClient {
   /* Read Timeout in ms for waiting for data after the connection is established */
   private static final int DEFAULT_READ_TIMEOUT_MS = 3600;
 
-  private RequestConfig requestConfig = RequestConfig.custom()
+  private static final RequestConfig requestConfig = RequestConfig.custom()
     .setConnectTimeout(DEFAULT_CONNECT_TIMEOUT_MS)
     .setSocketTimeout(DEFAULT_READ_TIMEOUT_MS)
     .build();

src/test/java/io/cdap/plugin/servicenow/restapi/RestAPIClientTest.java

@@ -114,7 +114,6 @@ public void testExecuteGet_throwConnectTimeoutException_markAsRetryable() throws
     Mockito.when(httpClient.execute(Mockito.any()))
       .thenThrow(new ConnectTimeoutException("Connection timed out"));
 
-
     ServiceNowTableAPIRequestBuilder builder = new ServiceNowTableAPIRequestBuilder("url");
     RestAPIRequest request = builder.build();
 
@@ -125,6 +124,6 @@ public void testExecuteGet_throwConnectTimeoutException_markAsRetryable() throws
     Assert.assertTrue(actualResponse.getException().isErrorRetryable());
     Throwable ex = actualResponse.getException().getCause();
     Assert.assertTrue("Expected ConnectTimeoutException or similar, got: " + ex,
-       ex instanceof ConnectTimeoutException || ex.getMessage().toLowerCase().contains("Connection timed out"));
+      ex instanceof ConnectTimeoutException || ex.getMessage().toLowerCase().contains("Connection timed out"));
   }
 }