BUG-2159: bump jacoco version

0.6.2 does not work with Java 8, as it mucks around in its internals.
Version 0.7.2 seems to work okay.

Change-Id: I0b2d2c4a5e58d6574f87ff755bd9319bb6515422
Signed-off-by: Robert Varga <rovarga@cisco.com>
Merge "BUG-2159: bump jacoco version"