[openstack|identity] add tests for check_token and validate_token par…

…ameters

Fixes fog#3493

lib/fog/openstack/requests/identity/check_token.rb

@@ -12,6 +12,8 @@ def check_token(token_id, tenant_id=nil)
       end
 
       class Mock
+        def check_token(token_id, tenant_id=nil)
+        end
       end
     end
   end

lib/fog/openstack/requests/identity/validate_token.rb

@@ -12,6 +12,8 @@ def validate_token(token_id, tenant_id=nil)
       end
 
       class Mock
+        def validate_token(token_id, tenant_id=nil)
+        end
       end
     end
   end

tests/openstack/authenticate_tests.rb

@@ -89,6 +89,16 @@
       end
     end
 
+    tests("validate token") do
+        Fog::Identity[:openstack].validate_token(token, tenant_token)
+        Fog::Identity[:openstack].validate_token(token)
+    end
+
+    tests("check token") do
+      Fog::Identity[:openstack].check_token(token, tenant_token)
+      Fog::Identity[:openstack].check_token(token)
+    end
+
     tests("v2 missing service") do
       Excon.stub({ :method => 'POST', :path => "/v2.0/tokens" },
                  { :status => 200, :body => Fog::JSON.encode(body) })