Fix default of vswitch::provider in RedHat OS

The vswitch::provider parameter is set to 'ovs_redhat' but it results
in including the vwitch::ovs_redhat class which has never existed.
The parameter is supposed to take ovs or dpdk thus the default should
be ovs even in RedHat OS.

Change-Id: I84d023ab82c0432eeb762682d0496d6c6bbf2e82
(cherry picked from commit 961eed828c)

manifests/params.pp

@@ -14,7 +14,7 @@ class vswitch::params {
       $ovsdb_service_name    = undef
       $ovs_service_hasstatus = undef
       $ovs_status            = undef
-      $provider              = 'ovs_redhat'
+      $provider              = 'ovs'
     }
     'Debian': {
       $ovs_package_name      = 'openvswitch-switch'