call rhn-migrate-classic-to-rhsm with --remove-rhn-packages

but only if we have removepkgs set (which is the default, though)

bootstrap.py

@@ -192,6 +192,8 @@ def migrate_systems(org_name, activationkey):
         options.rhsmargs += " --legacy-user '%s' --legacy-password '%s'" % (options.legacy_login, options.legacy_password)
     else:
         options.rhsmargs += " --keep"
+    if options.removepkgs:
+        options.rhsmargs += " --remove-rhn-packages"
     exec_failexit("/usr/sbin/rhn-migrate-classic-to-rhsm --org %s --activation-key '%s' %s" % (org_label, activationkey, options.rhsmargs))
     exec_failexit("subscription-manager config --rhsm.baseurl=https://%s/pulp/repos" % options.foreman_fqdn)