catch mysql connection errors and try to reconnect

To prevent the thread manager from killing us on a failed reconnect
we can just catch the exception here and go on with another reconnect.
That properly increases our internal counters and triggers the intendet
error handling.

Signed-off-by: Florian Pelgrim <florian.pelgrim@craneworks.de>

Author: Sven Hoexter

mysql_statsd/thread_mysql.py

@@ -55,8 +55,11 @@ def configure(self, config_dict):
         return self.host, self.port, self.sleep_interval
 
     def setup_connection(self):
-        self.connection = mdb.connect(host=self.host, user=self.username, port=self.port, passwd=self.password)
-        return self.connection
+        try:
+            self.connection = mdb.connect(host=self.host, user=self.username, port=self.port, passwd=self.password)
+            return self.connection
+        except Exception:
+            self.reconnect()
 
     def stop(self):
         """ Stop running this thread and close connection """