I'll take care of that sometime soon.
RFE #744132 opened in the RHEL bugzilla

Yeah, I'm convinced that we need to allow a configurable idle timeout
for the SSSD LDAP connections. Please log an enhancement ticket upstream
at https://fedorahosted.org/sssd if you have a Fedora account. If not,
feel free to file a bug on whichever distro is appropriate, and post it
here.

RFE #744197 opened in the RHEL bugzilla

Thanks!
Ondrej