mor integration tests

src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/converter/ArrayOfStringConverter.java

@@ -85,7 +85,7 @@ public class ArrayOfStringConverter implements AttributeValueConverter {
             final ConfigurationValue value,
             final boolean xml) throws IOException {
 
-        final String val = (value.value != null) ? value.value : attribute.getDefaultValue();
+        final String val = (value != null && value.value != null) ? value.value : attribute.getDefaultValue();
         if (StringUtils.isNotBlank(val)) {
 
             final String[] values = StringUtils.split(val, Constants.LIST_SEPARATOR);

src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/converter/InlineTableConverter.java

@@ -92,7 +92,7 @@ public class InlineTableConverter implements AttributeValueConverter {
                 (xml) ? XML_KEY_TEMPLATE : JSON_KEY_TEMPLATE,
                 AttributeValueConverter.extractName(attribute))));
 
-        if (StringUtils.isBlank(value.value)) {
+        if (value == null || StringUtils.isBlank(value.value)) {
             out.write((xml) ? XML_EMPTY_ARRAY : JSON_EMPTY_ARRAY);
             out.flush();
             return;