Dont add LF to Subject: in gerrit notifications

Workaround for Gerrit issue

http://code.google.com/p/gerrit/issues/detail?id=1776

Our notification emails have subject line like this:

Subject:
=?UTF-8?Q?[Gerrit]_Update_pom_-_change_(mediawiki...mwdumper[master])=0A?=

While it should be (in this case):

Subject: [Gerrit] Update pom - change (mediawiki...mwdumper[master])

without extra LF at the end.

Original (not customized) notification emails do not have this
problem because the last token on the line is a macro call
(#elipses).

This is a Velocity Template Engine problem that should
probably be worked around in Gerrit:

    https://issues.apache.org/jira/browse/VELOCITY-253

Change-Id: I893d8cfbd420888c346b3a305de0329f24e76ff4
Merge "Dont add LF to Subject: in gerrit notifications" into production