fix the logic that marks distributionSet as complete

DistributionSets without SoftwareModules shall not be marked as
complete, when no Software Module is assigned

Signed-off-by: Ravindranath Sandeep (INST-IOT/ESW-Imb) <Sandeep.Ravindranath@bosch-si.com>

hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/model/JpaDistributionSetType.java

@@ -10,6 +10,7 @@
 
 import java.util.Collections;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Optional;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -209,8 +210,12 @@ public void setKey(final String key) {
 
     @Override
     public boolean checkComplete(final DistributionSet distributionSet) {
-        return distributionSet.getModules().stream().map(SoftwareModule::getType).collect(Collectors.toList())
-                .containsAll(getMandatoryModuleTypes());
+        List<SoftwareModuleType> smTypes = distributionSet.getModules().stream().map(SoftwareModule::getType)
+                .collect(Collectors.toList());
+        if (smTypes.isEmpty()) {
+            return false;
+        }
+        return smTypes.containsAll(getMandatoryModuleTypes());
     }
 
     @Override