Fix issue with retry logic querying prometheus

The issue is that the successful response from prometheus wasn't
triggering of the exit from the retry loop. Now on successful queries
the while retry loop will break into a successful exit strategy.

Change-Id: I528c1c17d2131256097cac5a67ec7ea17541c685

nagios/plugins/check_exporter_health_metric.py

@@ -113,6 +113,7 @@ def query_exporter_metric(exporter_namespace, label_selector, metric_name):
             for metric in line_item_metrics:
                 metric_with_labels, value = metric.split(" ")
                 metrics[metric_with_labels] = float(value)
+            break
         except Exception as e:
             if retry < max_retry:
                 print('Request timeout, Retrying - {}'.format(retry))

nagios/plugins/query_prometheus_alerts.py

@@ -154,6 +154,7 @@ def query_prometheus(prometheus_api, alertname, labels_csv, timeout):
             response = requests.get(include_schema(
                 prometheus_api) + "/api/v1/query", **kwargs)
             response_json = response.json()
+            break
         except requests.exceptions.Timeout:
             if retry < max_retry:
                 print('Request timeout, Retrying - {}'.format(retry))
@@ -214,6 +215,7 @@ def check_prom_metrics_available(prometheus_api, metrics, labels_csv, timeout):
                     metrics_available = False
                 else:
                     metrics_available = True
+            break
         except requests.exceptions.Timeout:
             if retry < max_retry:
                 retry += 1