Ensure backwards compatibility with command form

Author: sameagen-MW

src/main/java/com/mathworks/ci/RunMatlabCommandStep.java

@@ -11,6 +11,7 @@
 import org.jenkinsci.plugins.workflow.steps.StepDescriptor;
 import org.jenkinsci.plugins.workflow.steps.StepExecution;
 import org.kohsuke.stapler.DataBoundConstructor;
+import org.kohsuke.stapler.DataBoundSetter;
 import com.google.common.collect.ImmutableSet;
 import hudson.EnvVars;
 import hudson.Extension;
@@ -23,19 +24,23 @@
 public class RunMatlabCommandStep extends Step {
 
     private String command;
-    private String startupOptions;
+    private String startupOptions = "";
 
     @DataBoundConstructor
-    public RunMatlabCommandStep(String command, String startupOptions) {
+    public RunMatlabCommandStep(String command) {
         this.command = command;
-        this.startupOptions = startupOptions;
     }
 
 
     public String getCommand() {
         return this.command;
     }
 
+    @DataBoundSetter
+    public void setStartupOptions(String startupOptions) {
+        this.startupOptions = startupOptions;
+    }
+
     public String getStartupOptions() {
         return Util.fixNull(this.startupOptions);
     }

src/test/java/com/mathworks/ci/RunMatlabCommandStepTester.java

@@ -20,8 +20,8 @@
 
 public class RunMatlabCommandStepTester extends RunMatlabCommandStep {
     @DataBoundConstructor
-    public RunMatlabCommandStepTester(String command, String startupOptions) {
-        super(command, startupOptions);
+    public RunMatlabCommandStepTester(String command) {
+        super(command);
     }
 
     @Override