Alleviate the race condition in the pool-checkout-maxConnecting-is-enforced test (#1366)

JAVA-5417

Author: stIncMale

driver-core/src/test/resources/connection-monitoring-and-pooling/cmap-format/pool-checkout-maxConnecting-is-enforced.json

@@ -19,7 +19,7 @@
       ],
       "closeConnection": false,
       "blockConnection": true,
-      "blockTimeMS": 750
+      "blockTimeMS": 800
     }
   },
   "poolOptions": {
@@ -53,7 +53,7 @@
     },
     {
       "name": "wait",
-      "ms": 100
+      "ms": 400
     },
     {
       "name": "checkOut",