Fix some compiler warns in test code

Author: runeflobakk

src/test/java/no/digipost/api/client/internal/delivery/MessageDelivererTest.java

@@ -353,13 +353,13 @@ void setMapAndMessageToPrintClonesMessage(String description, Message message) {
 
     private static Stream<Arguments> provideMessages() {
         Document primaryDoc = new Document(
-                UUID.randomUUID(), RandomStringUtils.randomAlphanumeric(1, 128), FileType.PDF
+                UUID.randomUUID(), RandomStringUtils.insecure().nextAlphanumeric(1, 128), FileType.PDF
         );
         PrintRecipient printRecipient = new PrintRecipient();
         PrintDetails printDetails = new PrintDetails(printRecipient, printRecipient);
         MessageRecipient directPrintRecipient = new MessageRecipient(printDetails);
         MessageRecipient fallbackPrintRecipient = new MessageRecipient(
-                new PersonalIdentificationNumber(RandomStringUtils.randomNumeric(11)), printDetails
+                new PersonalIdentificationNumber(RandomStringUtils.insecure().nextNumeric(11)), printDetails
         );
         return Stream.of(
                 Arguments.of("direct print message", Message.newMessage(UUID.randomUUID(), primaryDoc)

src/test/java/no/digipost/api/client/internal/delivery/MockfriendlyResponse.java

@@ -189,7 +189,7 @@ public void setHeader(String name, Object value) {
     }
 
     @Override
-    public void setHeaders(Header[] headers) {
+    public void setHeaders(Header ... headers) {
         throw new UnsupportedOperationException("This is a mock");
     }
 
@@ -245,6 +245,11 @@ public HttpEntity getEntity() {
                     return entity;
                 }
 
+                @Override
+                public int getCode() {
+                    return status;
+                }
+
                 @Override
                 public void close() throws IOException {
                 }