[JENKINS-43786] Reverting development code

Author: recena

src/main/java/hudson/plugins/sshslaves/verifiers/MissingVerificationStrategyAdministrativeMonitor.java

@@ -43,7 +43,17 @@ public class MissingVerificationStrategyAdministrativeMonitor extends Administra
 
     @Override
     public boolean isActivated() {
-        return true;
+        for (Computer computer : Jenkins.getActiveInstance().getComputers()) {
+            if (computer instanceof SlaveComputer) {
+                ComputerLauncher launcher = ((SlaveComputer) computer).getLauncher();
+
+                if (launcher instanceof SSHLauncher && null == ((SSHLauncher) launcher).getSshHostKeyVerificationStrategy()) {
+                    return true;
+                }
+            }
+        }
+
+        return false;
     }
 
     /**