Register atexit handler before creation of testapp.
Register atexit handler before creation of testapp.

hms-dbmi/fourfront,hms-dbmi/fourfront,philiptzou/clincoded,ClinGen/clincoded,hms-dbmi/fourfront,philiptzou/clincoded,ClinGen/clincoded,ClinGen/clincoded,ClinGen/clincoded,T2DREAM/t2dream-portal,kidaa/encoded,T2DREAM/t2dream-portal,T2DREAM/t2dream-portal,ENCODE-DCC/snovault,kidaa/encoded,ENCODE-DCC/encoded,philiptzou/clincoded,ENCODE-DCC/encoded,ENCODE-DCC/snovault,4dn-dcic/fourfront,4dn-dcic/fourfront,T2DREAM/t2dream-portal,kidaa/encoded,kidaa/encoded,kidaa/encoded,ENCODE-DCC/snovault,ENCODE-DCC/snovault,4dn-dcic/fourfront,philiptzou/clincoded,ENCODE-DCC/encoded,philiptzou/clincoded,ENCODE-DCC/encoded,ENCODE-DCC/snovault,hms-dbmi/fourfront,4dn-dcic/fourfront,hms-dbmi/fourfront,ClinGen/clincoded