remove changes plugin version to inherit 2.8 from parent which work better with asf jira version
remove changes plugin version to inherit 2.8 from parent which work better with asf jira version

git-svn-id: 89dde08772e8bf23e1f06e036eef0c1fe886f791@1451363 13f79535-47bb-0310-9956-ffa450edef68

apache/commons-email,apache/commons-email,mohanaraosv/commons-email,mohanaraosv/commons-email,mohanaraosv/commons-email,apache/commons-email