Freshen RPM dependencies in vpp specfile.
Freshen RPM dependencies in vpp specfile.

VPP-1650

Also update specfile for fedora. Also update and
rationalize python3 and python2 dependencies
for CentOS.

Change-Id: Ia87abfe7b7080ecd07e485e6c32270fda56a496a
Signed-off-by: Thomas F Herbert <0786393240831fc3b5d6ed63658cfb1f3b1e6c40@redhat.com>

chrisy/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,vpp-dev/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp