Test the end-to-end refresh in the refresher_spec

Instead of just testing parse with vcr, then saving no inventory we can
run the full EmsRefresh.refresh in the vcr block so we can test
relationship links created in save_ems_inventory in the future.

spec/models/manageiq/providers/lenovo/physical_infra_manager/refresher_spec.rb

@@ -11,29 +11,24 @@
                        :name      => "LXCA",
                        :hostname  => "https://10.243.9.123",
                        :port      => "443",
-                       :ipaddress => "https://10.243.9.123:443")
+                       :ipaddress => "https://10.243.9.123:443").tap do |ems|
+                         ems.authentications << auth
+                       end
   end
 
-  let(:targets) { [ems] }
-  let(:refresher) { described_class.new(targets) }
+  it 'will perform a full refresh' do
+    2.times do # Run twice to verify that a second run with existing data does not change anything
+      result = VCR.use_cassette("#{described_class.name.underscore}") do
+        EmsRefresh.refresh(ems)
+      end
 
-  it 'will parse the legacy inventory' do
-    ems.authentications = [auth]
+      ems.reload
 
-    result = VCR.use_cassette("#{described_class.name.underscore}_parse_legacy_inventory") do
-      refresher.parse_legacy_inventory(ems)
+      assert_table_counts
     end
-
-    expect(result[:physical_servers].size).to eq(3)
-  end
-
-  it 'will save the inventory' do
-    ems.authentications = [auth]
-
-    refresher.save_inventory(ems, nil, {})
   end
 
-  it 'will execute post_process_refresh_classes' do
-    expect(refresher.post_process_refresh_classes).to eq([])
+  def assert_table_counts
+    expect(PhysicalServer.count).to eq(3)
   end
 end