Lazy-load the ProviderResolver

[GreyGhostStudio]

Just dropping in the bug we noticed around Synthesis in a production CD environment with the master db and master indexes removed.

"FieldNameTranslator is only used during generation and thus should not need to be changed in CD, but does as it currently stands due to the eager dependency resolution."

Here is the exception we were seeing:

4244 16:57:25 ERROR Error Initializing ProjectA.Model.Custom.CurrentPageBaseModel
Exception: System.TypeInitializationException
Message: The type initializer for 'Synthesis.Initializers' threw an exception.
Source: Synthesis
at Synthesis.ItemExtensions.As[TTemplate](Item item)
at ProjectA.Model.Custom.CurrentPageBaseModel.Initialize(Rendering rendering) in d:\Websites\ProjectA\ProjectA.Model\Custom\CurrentPageBaseModel.cs:line 15

Nested Exception

Exception: System.ArgumentException
Message: Index sitecore_master_index was not found
Source: Sitecore.ContentSearch
at Sitecore.ContentSearch.ContentSearchManager.GetIndex(String name)
at Synthesis.Configuration.ProviderResolver.LoadFieldNameTranslatorFromConfig()
at Synthesis.Configuration.ProviderResolver..ctor()
at Synthesis.Configuration.ProviderResolver.get_Current()
at Synthesis.Initializers..cctor()

Switching this value removed the errors:

Setting: indexConfiguration name="sitecore_web_index"