Add support of Java 8 `java.time` classes

[federico-pellegatta]

Requirements

We must add support to Java 8 java.time. Have a look to https://docs.oracle.com/javase/8/docs/api/java/time/package-summary.html

Specs

• At least the following classes must be supported:
  • LocalDate: A date without a time-zone in the ISO-8601 calendar system, such as 2007-12-03.
  • LocalDateTime: A date-time without a time-zone in the ISO-8601 calendar system, such as 2007-12-03T10:15:30.
  • LocalTime: A time without a time-zone in the ISO-8601 calendar system, such as 10:15:30.
  • Duration: A time-based amount of time, such as 34.5 seconds.
• Support must be provided for both:
  • JSON serialization and deserialization as RootJsonFormats
  • Slick database columns conversion as MappedColumnTypes