Fix getting white list, ban list, and op list. Fixes BUKKIT-5538

The getEntries methods on these return player names instead of UUIDs.
As we need the UUIDs for our API we add a getValues method to get at
the data we need. To further ensure we get the most data possible we
also add a way to get at the stored GameProfile to ensure we always
have both the UUID and the name from the list.

By: Travis Watkins <amaranth@ubuntu.com>

paper-server/src/main/java/org/bukkit/craftbukkit/CraftIpBanEntry.java

@@ -2,7 +2,9 @@ package org.bukkit.craftbukkit;
 
 import net.minecraft.server.IpBanEntry;
 import net.minecraft.server.IpBanList;
+import net.minecraft.server.MinecraftServer;
 
+import java.io.IOException;
 import java.util.Date;
 
 public final class CraftIpBanEntry implements org.bukkit.BanEntry {
@@ -75,6 +77,10 @@ public final class CraftIpBanEntry implements org.bukkit.BanEntry {
     public void save() {
         IpBanEntry entry = new IpBanEntry(target, this.created, this.source, this.expiration, this.reason);
         this.list.add(entry);
-        this.list.save();
+        try {
+            this.list.save();
+        } catch (IOException ex) {
+            MinecraftServer.getLogger().error("Failed to save banned-ips.json, " + ex.getMessage());
+        }
     }
 }