When we can't find a property stored in a Nested/Inner content item, it doesn't need to throw

The property could have been stored once and then removed from the datatype definition
Fixes #8

Author: nul800sebastiaan

src/Umbraco.Deploy.Contrib.Connectors/ValueConnectors/InnerContentConnector.cs

@@ -181,7 +181,10 @@ public void SetValue(IContentBase content, string alias, string value)
                     var propertyType = contentType.CompositionPropertyTypes.FirstOrDefault(x => x.Alias == key);
 
                     if (propertyType == null)
-                        throw new NullReferenceException($"No Property Type found with alias {key} on Content Type {contentType.Alias}");
+                    {
+                        LogHelper.Debug<InnerContentConnector>($"No Property Type found with alias {key} on Content Type {contentType.Alias}");
+                        continue;
+                    }
 
                     // throws if not found - no need for a null check
                     var propValueConnector = ValueConnectors.Get(propertyType);

src/Umbraco.Deploy.Contrib.Connectors/ValueConnectors/NestedContentValueConnector.cs

@@ -197,7 +197,10 @@ public void SetValue(IContentBase content, string alias, string value)
                     var propertyType = contentType.CompositionPropertyTypes.FirstOrDefault(x => x.Alias == key);
 
                     if (propertyType == null)
-                        throw new NullReferenceException($"No Property Type found with alias {key} on Content Type {contentType.Alias}");
+                    {
+                        LogHelper.Debug<NestedContentValueConnector>($"No Property Type found with alias {key} on Content Type {contentType.Alias}");
+                        continue;
+                    }
 
                     // throws if not found - no need for a null check
                     var propValueConnector = ValueConnectors.Get(propertyType);