test: use a reduced minHeartbeatFrequencyMS for spec test runner

Author: mbroadst

test/functional/spec-runner/index.js

@@ -233,6 +233,7 @@ function runTestSuiteTest(configuration, spec, context) {
   // test-specific client options
   clientOptions.autoReconnect = false;
   clientOptions.haInterval = 100;
+  clientOptions.minHeartbeatFrequencyMS = 100;
   clientOptions.useRecoveryToken = true;
 
   // TODO: this should be configured by `newClient` and env variables