Pretty print cluster connect timeout in logs (#405)

* Pretty print cluster connect timeout in logs

Before this change, we were logging the cluster connect timeout
as it is. Its default value is equal to `sys.maxsize`, so the
logs were like

```
... cluster connect timeout: 92233720368547758067s ...
```

We now output `INFINITE` for the default value.

```
... cluster connect timeout: INFINITE
```

If the user provides a different value, it will be printed
as it is now.

* use float('inf') instead of sys.maxsize for the cluster connect timeout

* use float formatting in logs

Author: mdumandag

hazelcast/connection.py

@@ -2,7 +2,6 @@
 import logging
 import random
 import struct
-import sys
 import threading
 import time
 import uuid
@@ -33,6 +32,8 @@
 
 _logger = logging.getLogger(__name__)
 
+_INF = float("inf")
+
 
 class _WaitStrategy(object):
     def __init__(self, initial_backoff, max_backoff, multiplier, cluster_connect_timeout, jitter):
@@ -45,6 +46,11 @@ def __init__(self, initial_backoff, max_backoff, multiplier, cluster_connect_tim
         self._cluster_connect_attempt_begin = None
         self._current_backoff = None
 
+        if cluster_connect_timeout == _INF:
+            self._cluster_connect_timeout_text = "INFINITE"
+        else:
+            self._cluster_connect_timeout_text = "%.2fs" % self._cluster_connect_timeout
+
     def reset(self):
         self._attempt = 0
         self._cluster_connect_attempt_begin = time.time()
@@ -55,9 +61,9 @@ def sleep(self):
         time_passed = time.time() - self._cluster_connect_attempt_begin
         if time_passed > self._cluster_connect_timeout:
             _logger.warning(
-                "Unable to get live cluster connection, cluster connect timeout (%ds) is reached. "
+                "Unable to get live cluster connection, cluster connect timeout (%s) is reached. "
                 "Attempt %d.",
-                self._cluster_connect_timeout,
+                self._cluster_connect_timeout_text,
                 self._attempt,
             )
             return False
@@ -69,10 +75,10 @@ def sleep(self):
         sleep_time = min(sleep_time, self._cluster_connect_timeout - time_passed)
         _logger.warning(
             "Unable to get live cluster connection, retry in %.2fs, attempt: %d, "
-            "cluster connect timeout: %ds, max backoff: %ds",
+            "cluster connect timeout: %s, max backoff: %.2fs",
             sleep_time,
             self._attempt,
-            self._cluster_connect_timeout,
+            self._cluster_connect_timeout_text,
             self._max_backoff,
         )
         time.sleep(sleep_time)
@@ -315,7 +321,7 @@ def _init_wait_strategy(self, config):
             # If the no timeout is specified by the
             # user, or set to -1 explicitly, set
             # the timeout to infinite.
-            cluster_connect_timeout = sys.maxsize
+            cluster_connect_timeout = _INF
 
         return _WaitStrategy(
             config.retry_initial_backoff,