Fix check for slave existence

PROD-30944

Change-Id: I253f22673d0fdd4ca301ad3e2a0b109dff5894da
diff --git a/jenkins/files/groovy/node.template b/jenkins/files/groovy/node.template
index d2dc5c6..827e928 100644
--- a/jenkins/files/groovy/node.template
+++ b/jenkins/files/groovy/node.template
@@ -32,7 +32,7 @@
                it.remoteFS == "${remote_home}" &&
                it.labelString == "${label}" &&
                it.mode == Node.Mode.${node_mode} &&
-               it.launcher.vmargs == ("${jvmopts}" ?: null) &&
+               it.launcher.jvmOptions == "${jvmopts}" &&
                it.launcher.getClass().getName().equals(launcherName) &&
                it.retentionStrategy.getClass().getName().equals(retStrategyName)
              }