Fix the 'http'->'http_proxy' for Proxy settings #S214804

As System Environmental variables are set up as http_proxy and https_proxy, not http and https, so we need to make the same change in controller base also.

Author: saikatbasu01

authorizenet/apicontrollersbase.py

@@ -124,8 +124,8 @@ def execute(self):
 
         self.beforeexecute()
 
-        proxyDictionary = {'http' : utility.helper.getproperty("http_proxy"), 
-                           'https' : utility.helper.getproperty("https_proxy"), 
+        proxyDictionary = {'http' : utility.helper.getproperty("http_proxy"),
+                           'https' : utility.helper.getproperty("https_proxy"),
                            'ftp' : utility.helper.getproperty("ftp")}
 
         #requests is http request