fix Auto-application warnings

[xuwei-k]

[warn] /home/travis/build/playframework/play-slick/src/core/src/test/scala/play/api/db/slick/SlickApiSpec.scala:51:20: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method dbConfigs,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]       api.dbConfigs[BasicProfile] must have size 4
[warn]                    ^
[warn] /home/travis/build/playframework/play-slick/src/core/src/test/scala/play/api/db/slick/SlickApiSpec.scala:55:20: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method dbConfigs,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]       api.dbConfigs[BasicProfile] must throwA[PlayException]
[warn]                    ^
[warn] /home/travis/build/playframework/play-slick/src/core/src/test/scala/play/api/db/slick/SlickApiSpec.scala:59:20: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method dbConfigs,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]       api.dbConfigs[BasicProfile] must throwA[PlayException]
[warn]                    ^

[warn] /home/travis/build/playframework/play-slick/samples/computer-database/app/controllers/Application.scala:76:18: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method bindFromRequest,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     computerForm.bindFromRequest.fold(
[warn]                  ^
[warn] /home/travis/build/playframework/play-slick/samples/computer-database/app/controllers/Application.scala:92:18: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method bindFromRequest,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     computerForm.bindFromRequest.fold(
[warn]                  ^

[warn] /home/travis/build/playframework/play-slick/samples/basic/app/controllers/Application.scala:36:28: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method bindFromRequest,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     val cat: Cat = catForm.bindFromRequest.get
[warn]                            ^
[warn] /home/travis/build/playframework/play-slick/samples/basic/app/controllers/Application.scala:41:28: Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method bindFromRequest,
[warn] or remove the empty argument list from its definition (Java-defined methods are exempt).
[warn] In Scala 3, an unapplied method like this will be eta-expanded into a function.
[warn]     val dog: Dog = dogForm.bindFromRequest.get
[warn]                            ^