updated release notes

RELEASE_NOTES.txt

+Release 3.0.1 (08/09/2019)
+=============================
+- Fixed issue with unchecked additions to metadata catalog
+- Updated support software:
+  - OpenJDK (replaces Oracle JDK)
+  - Payara (replaces Glassfish)
+- Added 12IDB utilities
+
 Release 3.0.0 (07/26/2019)
 =============================
 - Added python web service API for downloading files