Revert "updated jacoco plugin version"

Apparently using 0.7.5 "confuses" Hudson Jacoco plugin which reports
code as uncovered while it is surely covered.

This reverts commit a156d13229a59954d3db45c3db35bab4a17097b8.

Change-Id: Idf9f296f011422a70f6b10de282bdbac4cd88619
1 file changed