Redo hwid bans - reduce amount of db queries on login

Works by loading all hwid bans on startup and querying the collection in memory
rather than making calls on every login.

src/main/resources/db/migration/postgresql/V0.10__ban.sql

@@ -6,3 +6,12 @@ CREATE TABLE ip_ban
     PRIMARY KEY (ip)
 );
 GRANT SELECT, INSERT ON TABLE ip_ban TO ${server-username};
+
+CREATE TABLE hwid_ban
+(
+    hwid       varchar(30)             NOT NULL,
+    account_id integer,
+    created_at timestamp DEFAULT now() NOT NULL,
+    PRIMARY KEY (hwid)
+);
+GRANT SELECT ON TABLE hwid_ban TO ${server-username};