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

- enrich jclMin1.8 with classes needed by OT/J
- configure more test projects for 1.8
- add 1.8 versions of JCL_LIB to some more test plugins
- accept jdt.annotation v2.0
- expect @role tag in tests
- revert part of commit 9981d84813a6706ae3f09010b2ce00ae51aa8c07
80 files changed