hg: code-tools/sigtest: Building maven plugins - change 1.5 bin/src level to 1.7

[mikhail.ershov at oracle.com]

Changeset: 7c37d575a41e
Author:    ersh
Date:      2014-10-26 01:19 +0300
URL:       http://hg.openjdk.java.net/code-tools/sigtest/rev/7c37d575a41e

Building maven plugins - change 1.5 bin/src level to 1.7

! build/pom.xml