Fix MySQL 5.1 failed to start issue + more verbose error reporting.

This patch add more verbose output to console in case the MySQL server fail to start. This might help to debug various issues, like corrupted database, wrong database version and so.

This should fix these BZ:

* https://bugzilla.redhat.com/show_bug.cgi?id=1045342
* https://bugzilla.redhat.com/show_bug.cgi?id=1051651