Update SampleController.groovy

Author: dshao

pegr/grails-app/controllers/pegr/SampleController.groovy

@@ -539,7 +539,13 @@ class SampleController {
 
         def samples = reportService.fetchDataForSamples(sampleIds)
 
-        render(view: '/report/print', model: [ sampleList: samples, samplesOnly: true])
+        def modules = samples.collect { it.sampleModules }.flatten().unique()
+        
+        if (modules.size() == 0) {
+            modules = ["moduleSampleMetadata"]
+        }
+        
+        render(view: '/report/print', model: [ sampleList: samples, samplesOnly: true, modules: modules])
     }
 
     def fetchPipelineAjax() {