Ref: add new static analyser rule: category/java/bestpractices.xml/MissingOverride

src/main/java/com/sheepit/client/network/ProxyAuthenticator.java

@@ -32,7 +32,7 @@ public class ProxyAuthenticator extends Authenticator {
 		this.password = password;
 	}
 	
-	protected PasswordAuthentication getPasswordAuthentication() {
+	@Override protected PasswordAuthentication getPasswordAuthentication() {
 		return new PasswordAuthentication(user, password.toCharArray());
 	}
 }