rms/openpbs: openpbs needs chkconfig

This tries to avoid errors like:

Synchronizing state of pbs.service with SysV service script with /usr/lib/systemd/systemd-sysv-install.
Executing: /usr/lib/systemd/systemd-sysv-install enable pbs
Failed to execute /usr/lib/systemd/systemd-sysv-install: No such file or directory

Signed-off-by: Adrian Reber <areber@redhat.com>

components/rms/openpbs/SPECS/openpbs.spec

@@ -138,6 +138,7 @@ Requires: hostname
 %endif
 %if 0%{?rhel} >= 7
 Requires: hwloc-ohpc
+Requires: chkconfig
 %endif
 Requires: libical
 Autoreq: 1
@@ -175,6 +176,7 @@ Requires: hostname
 %endif
 %if 0%{?rhel} >= 7
 Requires: hwloc-ohpc
+Requires: chkconfig
 %endif
 Autoreq: 1