Rebase all dates/timestamps in conversion in Java types

Currently, the fromJavaDate(), toJavaDate(), toJavaTimestamp() and fromJavaTimestamp() methods of DateTimeUtils perform rebase only dates before Gregorian cutover date 1582-10-15 assuming that Gregorian calendar has the same behavior in Java 7 and Java 8 API. The assumption is incorrect, in particular, in getting zone offsets, for instance:

scala> java.time.ZoneId.systemDefault
res16: java.time.ZoneId = America/Los_Angeles
scala> java.sql.Timestamp.valueOf("1883-11-10 00:00:00").getTimezoneOffset / 60.0
warning: there was one deprecation warning; re-run with -deprecation for details
res17: Double = 8.0
scala> java.time.ZoneId.of("America/Los_Angeles").getRules.getOffset(java.time.LocalDateTime.parse("1883-11-10T00:00:00"))
res18: java.time.ZoneOffset = -07:52:58

Java 7 is not accurate, America/Los_Angeles changed time zone shift from

-7:52:58

to

-8:00 

The ticket aims to perform rebasing for any dates/timestamps independently from calendar cutover date.