PYTHON-3353 Improve reliability of SDAM heartbeat error spec tests (#1005)

Author: ShaneHarvey

test/discovery_and_monitoring_integration/hello-command-error.json

@@ -117,7 +117,7 @@
             "failPoint": {
               "configureFailPoint": "failCommand",
               "mode": {
-                "times": 2
+                "times": 4
               },
               "data": {
                 "failCommands": [
@@ -162,22 +162,6 @@
               }
             ]
           }
-        },
-        {
-          "name": "assertEventCount",
-          "object": "testRunner",
-          "arguments": {
-            "event": "ServerMarkedUnknownEvent",
-            "count": 1
-          }
-        },
-        {
-          "name": "assertEventCount",
-          "object": "testRunner",
-          "arguments": {
-            "event": "PoolClearedEvent",
-            "count": 1
-          }
         }
       ],
       "expectations": [

test/discovery_and_monitoring_integration/hello-network-error.json

@@ -116,7 +116,7 @@
             "failPoint": {
               "configureFailPoint": "failCommand",
               "mode": {
-                "times": 2
+                "times": 4
               },
               "data": {
                 "failCommands": [

test/discovery_and_monitoring_integration/hello-timeout.json

@@ -117,7 +117,7 @@
             "failPoint": {
               "configureFailPoint": "failCommand",
               "mode": {
-                "times": 2
+                "times": 4
               },
               "data": {
                 "failCommands": [
@@ -160,22 +160,6 @@
               }
             ]
           }
-        },
-        {
-          "name": "assertEventCount",
-          "object": "testRunner",
-          "arguments": {
-            "event": "ServerMarkedUnknownEvent",
-            "count": 1
-          }
-        },
-        {
-          "name": "assertEventCount",
-          "object": "testRunner",
-          "arguments": {
-            "event": "PoolClearedEvent",
-            "count": 1
-          }
         }
       ],
       "expectations": [