update jdt.core to I20190220-1800 for 2019-03 M3

- fixed AIOOBE when tokens and positions didn't have the same length
  (occurred as secondary problem when j.l.Class was not found in
- stop running tests at 1.7
  ran into inconsistency between JCL_LIB and compliance
- update OTDEquinoxBuilderTests:
  - make then capable of running on 1.8
  - suppress pde error regarding missing package exports
5 files changed