Change version in pom.xml to 2.4-SNAPSHOT

The 2.3 was released and what we have in the master branch
is targeted for 2.4.

Change-Id: Idca8a12aaef1dc5ea5f628b3640881e66f04dc9c
Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>
20 files changed