Provide puppet-agent on RPM and Debian

This allows users to perform `dnf install puppet-agent` or
`apt install puppet-agent` and get openvox-agent instead. It also means
packages don't need to modify their dependencies. They probably still
should, but this helps users migrate.

It also tightens the Obsoletes statement to include the major version.
rpmlint raises the unversioned-explicit-obsoletes warning on the old
case. The Conflicts is kept unversioned, which is correct.

Author: ekohl

configs/projects/openvox-agent.rb

@@ -176,8 +176,13 @@
   end
 
   # make sure we can replace puppet-agent in place for the rename
-  proj.replaces 'puppet-agent'
+  proj.replaces 'puppet-agent', "< #{major.to_i + 1}"
   proj.conflicts 'puppet-agent'
+  if platform.is_rpm?
+    proj.provides 'puppet-agent', "= #{major}"
+  elsif platform.is_deb?
+    proj.provides 'puppet-agent', "(= #{major})"
+  end
 
   proj.timeout 7200 if platform.is_windows?
 end