cleanup validation tests

[kliushnichenko]

just a bit of cleaning

[kliushnichenko]

just aligning the doc with what we have at the moment. There is no ctx.flash(str,str) method

[kliushnichenko]

What I meant here is that it is possible to define the param as object @FlashParam Bean bean
and apt will generate the code that is not executable, since toNullable is not there for flash/session/...

The use-case a bit synthetic, but still, I can add some type checking if you think it makes sense

[jknack]

Let's add the type check

[jknack]

Let's add the type check

[kliushnichenko]

Added type verification.

Flash, Session, Cookie, and Header params are now restricted to BUILT_IN types.
Let me know if I missed smthg.

Error message will look like this:

Illegal argument type at 'tests.verifyarg.ControllerFlash.param()'. 
Parameter 'param' annotated as [io.jooby.annotation.FlashParam] cannot be of type 'java.lang.Object'. 
Supported types are: [java.lang.Byte, java.lang.Short, java.lang.Character, java.lang.String, short, int, java.net.URI, java.lang.Float, java.lang.Boolean, float, char, java.time.LocalDateTime, byte, java.lang.Enum, java.math.BigInteger, java.util.UUID, java.util.Date, java.lang.Long, java.math.BigDecimal, io.jooby.StatusCode, java.lang.Double, boolean, java.net.URL, java.time.ZoneId, java.util.TimeZone, java.lang.Integer, java.time.LocalDate, java.time.Instant, java.time.Duration, java.nio.charset.Charset, java.time.Period, double, long]