It was agreed that some log files can be located in /var/log instead of /opt/rh/name/root/var/log. The reason is that some users like to handle all log files at once in order to make backup or performance tuning easier. Thus for example mysql SCL logs by default to /var/log/mysql55-mysql. I think we could mention this in the documentation, at least as a notice.
Fixed in: Red_Hat_Developer_Toolset-Software_Collections_Guide-2-Beta-en-US-2.0-8 http://documentation-devel.engineering.redhat.com/docs/en-US/Red_Hat_Developer_Toolset/2-Beta/html-single/Software_Collections_Guide/index.html#sect-Software_Collection_Log_File_Support
Published at: https://access.redhat.com/site/documentation/en-US/Red_Hat_Developer_Toolset/2/html-single/Software_Collections_Guide/index.html