[MCHECKSTYLE-240] added 37 to ignored MagicNumber (used sometimes like 31 in hash calculations)

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1618631 13f79535-47bb-0310-9956-ffa450edef68
[MCHECKSTYLE-246] added UniqueProperties rule (introduced in Checkstyle 5.7)

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1618632 13f79535-47bb-0310-9956-ffa450edef68