Resolve undefined method `get_cookies'

Anemone::Page is not a Rex HTTP request/response, and uses the
:cookies method to return an array of cookies.
This resolves the method naming error, though it does break with
Rex naming convention since Anemone still uses a lot non-Rex
methods for working with pages/traffic.

Author: RageLtMan

modules/auxiliary/scanner/http/crawler.rb

@@ -104,8 +104,8 @@ def crawler_process_page(t, page, cnt)
       info[:ctype] = page.headers['content-type']
     end
 
-    if !page.get_cookies.empty?
-      info[:cookie] = page.get_cookies
+    if !page.cookies.empty?
+      info[:cookie] = page.cookies
     end
 
     if page.headers['authorization']