If the request is invalid (ie I don't have the parameters I expect) the getRemoteAddr method return the localhost address (#182)

Author: sapessi

aws-serverless-java-container-core/src/main/java/com/amazonaws/serverless/proxy/internal/servlet/AwsProxyHttpServletRequest.java

@@ -584,6 +584,9 @@ public BufferedReader getReader()
 
     @Override
     public String getRemoteAddr() {
+        if (request.getRequestContext() == null || request.getRequestContext().getIdentity() == null) {
+            return "127.0.0.1";
+        }
         return request.getRequestContext().getIdentity().getSourceIp();
     }