EL8: fix generated RPM dependencies
EL8: fix generated RPM dependencies

RPM on EL8 uses requirements.txt to generate dependencies
Only psycopg2 2.7.5 is now available on RHEL repositories

Change-Id: Ibfbdc7e8952b299ba74280dcaaa3c5b61d1e1101

redhat-cip/dci-control-server,redhat-cip/dci-control-server