TestObjects: propagate Random.userId().

Addressed to #300

No functional changes.

Author: php-coder

src/test/java/ru/mystamps/web/service/TestObjects.java

@@ -88,11 +88,10 @@ public static AddUserDbDto createAddUserDbDto() {
 	}
 
 	public static UserDetails createUserDetails() {
-		final Integer anyId = 777;
 		String collectionSlug = TEST_LOGIN;
 
 		return new UserDetails(
-			anyId,
+			Random.userId(),
 			TEST_LOGIN,
 			TEST_NAME,
 			TEST_HASH,