Updated key/endpoint

Endpoints are not region-based anymore, but rather custom domain -based. Although regional endpoints will still work. Also, the authentication information is moving to a standard of getting it from environment variables.

Author: wiazur

python/Search/BingAutosuggestv7.py

@@ -9,10 +9,11 @@
 # *** Update or verify the following values. ***
 # **********************************************
 
-# Replace the subscriptionKey string value with your valid subscription key.
-subscriptionKey = 'enter key here'
+# Add your Bing Autosuggest subscription key to your environment variables.
+subscriptionKey = os.environ['BING_AUTOSUGGEST_SUBSCRIPTION_KEY']
 
-host = 'api.cognitive.microsoft.com'
+# Add your Bing Autosuggest endpoint to your environment variables.
+host = os.environ['BING_AUTOSUGGEST_ENDPOINT']
 path = '/bing/v7.0/Suggestions'
 
 mkt = 'en-US'