Back to Tomcat 7 for integration tests: with Tomcat 8 slow start issues

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_2_X@1630354 13f79535-47bb-0310-9956-ffa450edef68
Merge from 1_2_X

git-svn-id: https://svn.apache.org/repos/asf/syncope/trunk@1630355 13f79535-47bb-0310-9956-ffa450edef68