BPP-9691: StaticDateCalendarDetector

StaticDateCalendarDetector that reports all static Calendar / SimpleDateFormat
instances, not only public onces (as STCAL_STATIC_CALENDAR_INSTANCE,
STCAL_STATIC_SIMPLE_DATE_FORMAT_INSTANCE do)

Signed-off-by: Piotr Findeisen <piotr.findeisen@syncron.com>