Bug 573960 - POM and product version change for 4.21 release

Change-Id: I142ae5b75e83b8bc01e58dbacaf6ff29be2ba9ea
Signed-off-by: Sravan Kumar Lakkimsetti <sravankumarl@in.ibm.com>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.debug/+/181377
6 files changed