Fixed some context object's properties names

Fixed some context object's properties names in the example to make it work. Tested with both Node.js 6.10 and 8.10 and seems to be working fine.

Author: miguelangelglz

doc_source/nodejs-prog-model-context.md

@@ -24,9 +24,9 @@ exports.handler = function(event, context, callback) {
     console.log('value3 =', event.key3);
     console.log('remaining time =', context.getRemainingTimeInMillis());
     console.log('functionName =', context.functionName);
-    console.log('AWSrequestID =', context.awsRequestId);
-    console.log('logGroupName =', context.log_group_name);
-    console.log('logStreamName =', context.log_stream_name);
+    console.log('awsRequestId =', context.awsRequestId);
+    console.log('logGroupName =', context.logGroupName);
+    console.log('logStreamName =', context.logStreamName);
     console.log('clientContext =', context.clientContext);
     if (typeof context.identity !== 'undefined') {
         console.log('Cognito
@@ -116,4 +116,4 @@ Information about the client application and device when invoked through the AWS
 + **clientContext\.env\.model**
 + **clientContext\.env\.locale**
 
-For more information about the exact values for a specific mobile platform, see [Client Context](http://docs.aws.amazon.com/mobile/sdkforios/developerguide/lambda.html#clientcontext) in the *AWS Mobile SDK for iOS Developer Guide*, and [Client Context](http://docs.aws.amazon.com/mobile/sdkforandroid/developerguide/lambda.html#client-context) in the *AWS Mobile SDK for Android Developer Guide*\.
+For more information about the exact values for a specific mobile platform, see [Client Context](http://docs.aws.amazon.com/mobile/sdkforios/developerguide/lambda.html#clientcontext) in the *AWS Mobile SDK for iOS Developer Guide*, and [Client Context](http://docs.aws.amazon.com/mobile/sdkforandroid/developerguide/lambda.html#client-context) in the *AWS Mobile SDK for Android Developer Guide*\.