travis: show mysql packages

git-svn-id: http://svn.redmine.org/redmine/trunk@14232 e93f8b46-1217-0410-a6f0-8f06a7374b81

.travis.yml

@@ -52,6 +52,7 @@ matrix:
 before_install:
   - "sudo apt-get update -qq"
   - "sudo apt-get --no-install-recommends install bzr cvs git mercurial subversion"
+  - dpkg -l *mysql*
   - if [[ $DB =~ (mariadb|mysql-5\.[67]) ]] ;
     then
       sudo service mysql stop ;