fix: downgrade repetitive logging calls to debug (#885)

The current INFO calls, which are highly repetitive, don't meet
the typical 'severity level' of an INFO message, and are more suited
for DEBUG.

Refs Issue #781

Authored-by: Brad Solomon <solomonbj@america.gov>
diff --git a/googleapiclient/discovery.py b/googleapiclient/discovery.py
index 66d4927..609cead 100644
--- a/googleapiclient/discovery.py
+++ b/googleapiclient/discovery.py
@@ -277,7 +277,7 @@
         actual_url = _add_query_parameter(url, "userIp", os.environ["REMOTE_ADDR"])
     if developerKey:
         actual_url = _add_query_parameter(url, "key", developerKey)
-    logger.info("URL being requested: GET %s", actual_url)
+    logger.debug("URL being requested: GET %s", actual_url)
 
     resp, content = http.request(actual_url)
 
@@ -908,7 +908,7 @@
                     ) % multipart_boundary
                     url = _add_query_parameter(url, "uploadType", "multipart")
 
-        logger.info("URL being requested: %s %s" % (httpMethod, url))
+        logger.debug("URL being requested: %s %s" % (httpMethod, url))
         return self._requestBuilder(
             self._http,
             model.response,
@@ -1028,14 +1028,14 @@
             request.uri = _add_query_parameter(
                 request.uri, pageTokenName, nextPageToken
             )
-            logger.info("Next page request URL: %s %s" % (methodName, request.uri))
+            logger.debug("Next page request URL: %s %s" % (methodName, request.uri))
         else:
             # Replace pageToken value in request body
             model = self._model
             body = model.deserialize(request.body)
             body[pageTokenName] = nextPageToken
             request.body = model.serialize(body)
-            logger.info("Next page request body: %s %s" % (methodName, body))
+            logger.debug("Next page request body: %s %s" % (methodName, body))
 
         return request