Solution of https://cdcvs.fnal.gov/redmine/issues/5014
Solution of https://cdcvs.fnal.gov/redmine/issues/5014

pushd/popd added before/after the invocation of reconfig_glidein

bbockelm/glideinWMS,bbockelm/glideinWMS,bbockelm/glideinWMS,bbockelm/glideinWMS