There are no significant differences between 1.6.4 and 1.6.1 [0] so it
is easy for us to downgrade. Google has a one version policy for all
libraries. I've tried to upgrade the internal version of
powermock/easymock, but unfortunately it is used very widely and
1.6.4 has made some API changes that break a lot of builds. As there is
no real difference in those version for the use within Gerrit, it is
easier to downgrade to 1.6.1 as there are no real drawbacks for us.
[0] https://github.com/jayway/powermock/blob/master/changelog.txt
Change-Id: I1c16ff474b5730389ab20bad47eae781841369d6
3ef6bc7f99